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Find and compare cheap flights.

We search and compare billions of real-time prices on plane tickets so you can easily find the cheapest, quickest, and best flight deals for you.

New York flights

• Flights from Los Angeles to New York
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Bangkok flights

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Copenhagen flights

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Tokyo flights

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Chicago flights

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London flights

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Paris flights

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Miami flights

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Manila flights

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Las Vegas flights

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Los Angeles flights

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Istanbul flights

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Rome flights

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Barcelona flights

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• Flights from Philadelphia to Barcelona

Orlando flights

• Flights from New York to Orlando
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• Flights from Washington, D.C. to Orlando
• Flights from Detroit to Orlando
• Flights from Providence to Orlando
• Flights from Seattle to Orlando

How to find cheap flight deals with momondo

• How does momondo find such cheap airfare? momondo searches across hundreds of airlines and travel sites, from major booking sites to individual company sites, to give you as many cheap airfare options as possible. When you conduct a single search on momondo, you can find and compare cheap airline tickets like you’ve done hundreds of searches at once. momondo is completely free to use - with no hidden charges or fees - and the prices you see are never affected by your searches, no matter how many you make. We believe in an open world, where traveling and getting acquainted across borders and cultures is available to us all, so we’re committed to showing you the cheapest flights in our flight finder.
• How do I find the best price on plane tickets? Choose your destination and preferred travel dates, and we’ll provide you with an overview of the cheapest, quickest, and best flights so you can compare prices and book flights with confidence. Flexible on dates? It’s even easier to find cheap flights by using our Price Calendar (found above your search results), which shows you the cheapest travel dates. This is available on all of our most popular flight routes.
• How can Mix & Match save me money? Sometimes you can save money by combining flight tickets from different suppliers, and we call that Mix & Match. This means you can book your outbound flight with one supplier, and your return flight with another. If you can save money by combining tickets from different suppliers, we’ll automatically include this option in your flight results and label it Mix & Match. You’ll have to complete two separate booking flows after you select this deal on our site, but it’s worth it if you can save money over a traditional round-trip with one supplier. It’s an advanced way of getting the cheapest flights even if they’re offered by different suppliers.
• How do I make sure I don’t miss a flight deal? Sign up for Price Alerts on your favorite flight routes and automatically get live price updates, so you can book flights when the price is right. You can do so next to your flight search results or in the profile menu. If you're on our app, you will find Price Alerts in the navigation menu. You can also subscribe to special offers and limited-time flight deals from our partners. Just sign in, go to Notifications in your profile and subscribe to the topics you’re interested in.

Find Your Perfect Flight: Top Search Engines Reviewed

TL;DR: Key Takeaways

• Skyscanner leads the pack with over 90 million monthly visits, according to a 2019 SimilarWeb report.
• Google Flights shines with its use of the powerful ITA Matrix software.
• Kayak and Momondo  can aslo be good options for travel planning.
• Insider tips and tricks will elevate your flight booking game beyond the ordinary.
• Uncommon angles and approaches challenge the status quo, promising you better deals and more enjoyable travel experiences.

Why Your Flight Search Engine Matters More Than You Think

Every seasoned traveler knows that the journey begins long before you step on the plane. It starts in the quiet moments spent scouring the internet for the best flight deals .

But here's the kicker: not all flight search engines are created equal. Some are champions of cost, others excel in convenience, and a few are the hidden gems of the travel world.

Skyscanner: The Behemoth of the Skies

Skyscanner has firmly established itself as the titan of the flight search engine universe, a fact underscored by a 2019 SimilarWeb report highlighting its staggering influx of over 90 million visits each month. This monumental popularity is the fruit of meticulously designed features and functionalities that resonate with the needs and preferences of globetrotters across the globe.

At the heart of Skyscanner's appeal is its exceptionally user-friendly interface, which effortlessly guides users through the maze of flight booking with intuitive navigation and clear, concise information. This ease of use demystifies the often-overwhelming process of comparing flights, making it accessible to both seasoned travelers and first-time users alike.

Furthermore, Skyscanner's comprehensive database stands as a testament to its commitment to offering a wide array of choices. Covering a vast spectrum of airlines, from the largest international carriers to smaller domestic operators, and an extensive range of flight options, Skyscanner ensures that users have the freedom to explore every conceivable travel itinerary. This inclusivity not only enhances the likelihood of discovering the most cost-effective flights but also caters to the varied preferences and requirements of a diverse user base.

But the allure of Skyscanner extends beyond its interface and database . The platform is renowned for its innovative features, such as the ability to search for flights to 'anywhere' — a dream come true for spontaneous travelers and those seeking inspiration for their next destination. Additionally, Skyscanner's price alert system is a game-changer for budget-conscious flyers, notifying them of price drops and helping them secure flights at the best possible rates.

Google Flights: The Powerhouse of Precision

Google Flights , leveraging the formidable capabilities of ITA Matrix software, stands out as a colossus in the realm of flight search engines. This sophisticated software, hailed as one of the most advanced flight search systems available, sets Google Flights apart in a crowded marketplace. It's not merely a tool but a precision-engineered solution designed to navigate the intricate web of global air travel options.

What makes ITA Matrix's integration into Google Flights so revolutionary is its unparalleled efficiency in analyzing and processing vast amounts of flight data. This system delves deep into the complexities of airline schedules, pricing algorithms, and routing options to unearth flight combinations that might otherwise remain obscured. Whether you're looking for the shortest layovers, the least expensive routes, or a balance between convenience and cost, Google Flights is adept at presenting you with a curated selection of options that align perfectly with your travel criteria.

The brilliance of Google Flights lies in its ability to simplify the complexity behind the scenes into an intuitive and user-friendly interface. Travelers are empowered with the flexibility to modify search parameters with ease, including dates, destinations, and even airline preferences, all while the ITA Matrix works its magic in real-time. This seamless integration ensures that users can make informed decisions without feeling overwhelmed by the technicalities of airfare search algorithms.

Moreover, Google Flights goes beyond mere flight searches. It offers predictive analytics about price trends, advises on the best times to book, and even integrates with Google's vast ecosystem, allowing users to plan their trips more holistically.

This level of precision and integration embodies Google Flights' mission to not just meet but anticipate the needs of modern travelers, making it a true powerhouse of precision in the world of flight search engines.

Kayak: The Ultimate Travel Aggregator

Kayak stands as a beacon for comprehensive travel planning , distinguishing itself by aggregating hundreds of travel sites into one seamlessly intuitive platform.

It's not just about flights; Kayak encompasses hotels and car rentals, ensuring all facets of your journey are covered under one roof. The inclusion of innovative tools like the price forecast feature exemplifies Kayak's commitment to empowering travelers.

By advising users on the optimal time to purchase based on historical data and trends, it demystifies the often perplexing question of "buy now or wait?" Additionally, its flexible date search offers unparalleled adaptability, allowing travelers to navigate the complexities of booking with ease and confidence.

This holistic approach to travel planning positions Kayak as an indispensable resource for savvy travelers seeking convenience, efficiency, and value.

Momondo: The Colorful Pathfinder

Momondo emerges as a vibrant contender in the flight search engine arena, especially lauded for its prowess in unearthing the lowest prices for international flights.

Its interface is a breath of fresh air—vivid, user-friendly, and inviting, making the search for flights an enjoyable experience rather than a chore. Momondo's strength lies in its detailed search capabilities, which dive deep into a vast array of options to present the most cost-effective and convenient flights available.

This focus on delivering value, combined with an aesthetically pleasing design, makes Momondo a favorite among travelers who prioritize both budget and usability in their quest for the perfect flight.

The Wisdom of Flexibility

Scott Keyes hit the nail on the head when he said,

"The best flight search engines are those that consider flexibility in dates and airports."

Flexibility can unlock doors to deals you never thought possible, and the best search engines are those that allow you to play with your options.

Beyond the Basics: Insider Tips and Uncommon Approaches

Here's where we dive deeper. Beyond the familiar paths tread by casual travelers, lies a world of strategies that can lead to staggering savings and optimal travel experiences.

Ever considered a layover as an opportunity for a mini-adventure? Or using airport hubs as strategic waypoints to cheaper fares? These are the kinds of insights and tactics that can transform your travel planning from mundane to masterful.

A Personal Touch: My Secret Sauce

I've spent years in the trenches of travel planning, and if there's one thing I've learned, it's that the best deals come to those who look beyond the surface.

My secret? Start with the heavy hitters like Skyscanner and Google Flights for a broad overview, then drill down using niche engines that specialize in regional deals or specific travel niches.

Conclusion: The World at Your Fingertips

In conclusion, navigating the vast landscape of flight search engines can transform from a daunting task to an exciting journey with the right tools at your disposal.

Platforms like Skyscanner, Google Flights, Kayak, and Momondo each bring unique strengths to the table, ensuring that every traveler's needs are met with precision and efficiency.

Skyscanner dominates with its massive database and user-friendly interface, while Google Flights impresses with its advanced ITA Matrix software, offering unparalleled precision in flight searches. Kayak excels as the ultimate aggregator, providing a holistic view of travel options alongside innovative features like price forecasts and flexible searches. Momondo, with its focus on securing the lowest prices and its vibrant interface, stands out as the go-to for budget-conscious international travelers.

The evolution of these platforms reflects a broader trend in the travel industry towards more personalized, flexible, and efficient planning tools. By leveraging the unique capabilities of these top flight search engines, travelers can save both time and money, ensuring their journey is as smooth and enjoyable as the destination itself.

As we look to the future, the importance of choosing the right flight search engine cannot be overstated—it's about making informed decisions, maximizing value, and enhancing the overall travel experience.

Embrace the adventure of flight search with these powerhouse platforms. Whether you're a seasoned globetrotter or planning your first getaway, the key to a stress-free travel planning process lies in utilizing these tools to their fullest potential. Fly smarter and explore further, knowing that the best flight search engines for this year are ready to guide you to your next great adventure.

What makes a flight search engine "the best"?

The best flight search engines are those that offer a blend of comprehensive search results, user-friendly interfaces, and features that allow for flexible travel planning.

Why is Skyscanner so popular?

Skyscanner's popularity stems from its extensive database of flights and airlines, easy-to-use interface, and powerful filtering options.

How does Google Flights utilize ITA Matrix software?

Google Flights leverages ITA Matrix software to analyze complex flight data and provide users with optimized flight options based on multiple factors, including price, duration, and layovers.

Can flexibility really help me save on flights?

Yes, being flexible with your travel dates and departure/arrival airports can significantly increase your chances of finding better flight deals.

Are there any hidden gems among flight search engines?

Indeed, aside from the well-known giants, there are niche and regional flight search engines that can offer specialized deals, especially for specific destinations or travel styles.

How can I use layovers to my advantage?

Strategically planned layovers can not only reduce the cost of your flight but also give you the opportunity to explore an additional destination on your journey.

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5 Best Flight Search Engines for Finding the Cheapest Flights

Use these flight search engines to plan your next trip.

You've picked your next vacation spot , and it's time to look into flights. Where do you begin? There are several methods for researching flights, whether that's through airline websites and apps; online travel agencies (OTAs) like Expedia, Travelocity, and Orbitz; or through third-party metasearch engines.

If you're searching for the best price rather than for flights on a specific airline, you'll want to head to OTAs or metasearch engines, which will show you flight options from a variety of airlines. But a word of warning here: we don't recommend booking flights through OTAs. If something were to go wrong —  a flight delay or a canceled flight , for instance — the airline won't be able to help you find a solution, and you'll have to work with your OTA instead. It creates an extra step in the process, and an often frustrating one at that. The pro to booking through an OTA, however, is that the prices may be cheaper than booking through an airline directly. Book via an OTA at your own risk.

welcomeinside/Getty Images

For that reason, we're focusing this list on metasearch engines, though you could still use OTAs to search for flights, then book directly with the airline, if you so choose. Plus, most metasearch engines do include pricing from OTAs if you're looking for the absolute lowest price, regardless of the booking site.

And there's one more caveat to consider: Southwest Airlines generally does not allow its flights to show up in third-party search engines or booking platforms. There is one exception, which we've mentioned below.

So, without further ado, check out our picks for the best flight search engines.

Google Flights

In the 1990s, a company called ITA built the first flight search engine called QPX to help travelers find the lowest fares. Today, it has evolved into Google Flights , a robust, user-friendly search engine that is the best across the board for researching flight options. You can use a set of filters to narrow down your options — say, by time of departure or by airline alliance — and you can even track pricing to see if it drops over time. If you're planning a trip based on cheap airfare rather than selecting a destination first, Google Flights can help you there, too. Simply leave your destination open ended when searching for flights, and Google Flights will show you a map of airfare prices across the globe. 

Though Kayak is often lumped into the OTA category, it's actually a metasearch engine. That means you can't buy tickets via Kayak itself, but rather Kayak redirects you to airline sites or OTAs for booking. While Kayak hits all the highlights of major metasearch engines, such as search filters and price alerts, it stands out among competitors because it does include Southwest flights. But it does so in a specific capacity: it's only available for users with a (free) Kayak business account. Other things we like about Kayak include a feature called Fee Assistant, which helps calculate baggage fees, and Hacker Fares, which allows you to price out one-way fares on separate airlines. These fares may be cheaper than booking round-trip tickets with a single airline.

A sister site to Kayak, Momondo offers pretty much all the same services, including Hacker Fares, though it doesn't have Fee Assistant. What we like better about Momondo, however, is the fact that it automatically shows you flight prices for the days before and after your target travel dates, which could help you snag some pretty big flight deals. It also offers flight insights between your origin and destination, which includes stats like the cheapest month, day of the week, and time of day to travel. Plus, overall it's a very user-friendly site in terms of design.

Skyscanner is a classic flight metasearch engine, but it has some particular strengths over its competitors. First, it has a cheapest month feature that can help you pick the best time to visit a destination based on cheap airfare. Second, it includes some smaller OTAs which may help you find even cheaper prices than what's offered by the larger OTAs (again, we don't recommend booking through OTAs, so do so at your own risk). And third, it can be better than competitors at finding the lowest prices for last-minute flights.

Expert Flyer

Expert Flyer is indeed best for expert flyers. This tool requires a paid subscription, for which it has some very advanced features that go far beyond a simple flight search.  But it comes in particularly handy for flight searches by allowing you to search for award fare availability. As we said, this is best for expert flyers, as it requires pretty substantial airline knowledge to maximize its use, and its user interface isn't the most intuitive.

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The 14 Best Flight Search Sites for Booking Cheap Airfare

Contributing Editor Carl Unger believes that every trip is worth taking. He loves an extended trip to Europe as much as he enjoys exploring the towns and landscape near home. Basically, you'll find him wherever there is good food, fresh air, and plenty of stories to bring home.

Carl has been writing for SmarterTravel since 2005. His travel writing has also appeared on USA Today and the About.com Boston travel guide.

The Handy Item I Always Pack: "It's not revolutionary, but a small Moleskine notebook is my one travel must-have. It's great for noting things you want to remember and it takes up hardly any space in your bag."

Ultimate Bucket List Experience: "Japan. I'd love to take a month off and visit the cities, temples, and countryside. I'm fascinated by the country's juxtaposition of ancient traditions and modern ambitions."

Travel Motto: “Why do you go away? So that you can come back. So that you can see the place you came from with new eyes and extra colors. And the people there see you differently, too. Coming back to where you started is not the same as never leaving.” –Terry Pratchett

Aisle, Window, or Middle Seat: "Window."

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Wondering which website you should be booking your airfare with to get the best deal? You’re not alone. There are seemingly endless options when it comes to choosing the best flight booking site these days.

In addition to the option of booking directly with your airline, there are dozens of flight booking websites, also known as online travel agencies (OTAs), to choose from. The uncomfortable truth is that no one flight search engine can guarantee the best price 100 percent of the time, but using a mix of the right resources can help ensure you’re not overpaying.

The Best Flight Booking Sites

One important thing to remember about booking sites/OTAs is that Southwest fares are not sold on them. Some other airlines have also pulled their fares from some booking sites , but most airlines do make their fares available.

Here’s why these 14 are the best flight booking sites and metasearch options out there, and the best defining feature of each. Since it’s impossible to know which site will provide the best price for your particular trip, you should always compare fares from a few sources before you book.

Best Flight Search Site for Comparing Flight Types: Travelocity

It should be noted that Expedia owns Travelocity , so this flight booking site basically gives you Expedia price results with a different color scheme and organizational preferences. Travelocity’s homepage is streamlined but doesn’t offer a flexible-dates search. On the results page, bag fees are revealed by a pop-up screen that activates when clicking each fare, which makes it a little difficult to compare fees (you will likely have to scroll a bit). Travelocity charges booking fees for some but not all flights.

Best Feature: Travelocity displays all fares for a selected flight in a convenient pop-out window, allowing you to compare fares on a given itinerary while still scrolling through options from the search results on the same screen.

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Best Flight Search Site for Comparison Shopping: BookingBuddy

Editor’s note: BookingBuddy is owned by SmarterTravel Media, SmarterTravel.com’s parent company.

Compare multiple airfare sites with one click to find the best flight deals on BookingBuddy . This metasearch site lets you easily compare prices from other sites (like Priceline) without having to do a bunch of different searches. You can choose which flight search sites you want to compare, and BookingBuddy opens up a new tab with your selected flight dates and destinations already filled in.

Looking for a flight and hotel? BookingBuddy offers a combination flight and hotel search that can save you some decent money by bundling.

Best Feature: Sign up for a price drop alert, and BookingBuddy will email you when costs drop on your route.

Best Flight Search Site for Transparency: Expedia

As previously mentioned, Expedia is nearly identical to Travelocity, but fares did vary between the two sites on some of my searches. As with Travelocity (and to be fair, a number of other OTAs), Expedia will try to up-sell you on adding a hotel to your itinerary. This can save you money, but be sure to compare prices before you book. Expedia charges variable booking fees (and they are not always the same fees that Travelocity charges). When you select your fare from the list of options, there’s an interstitial step that displays what is and isn’t covered in the fare, including seat selection, cancellations, changes, and baggage rules.

Best Feature: Like its subsidiary Travelocity, Expedia basically double-checks that you understand what sort of fare you’re choosing before you click “select” again. It’s a helpful bit of transparency in today’s cluttered airfare landscape.

Best Flight Search Site for Nonstop Flights: CheapOair

Much like Travelocity and Expedia, flight search sites CheapOair and OneTravel (discussed later in this article) are versions of the same product, owned by Fareportal Inc. Though the sites are owned by the same company, the fare results are not always identical, so it’s worth checking both. CheapOair shows some “Super Saver Fares” for which you don’t find out the airline you’ll be flying until after you book—which means you also don’t find out what baggage fees apply until after you book. However, the savings might be worth it. CheapOair charges a service fee on air travel transactions, from $0 to $35 per ticket.

Best Feature: CheapOair prioritizes nonstop prices over itineraries with stops, organized in an easy-to-read chart that’s organized by airline.

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Best Flight Search Site with Flight Reviews: Tripadvisor Flights

Tripadvisor is known for its hotel reviews, and now travelers can apply their ratings to airlines, plus search for airfare on Tripadvisor Flights . On testing this flight booking site it’s clear that Tripadvisor doesn’t always serve up the cheapest fares, but sometimes it did. It always, however, gives you the option to surface Expedia, Travelocity, and other flight booking sites’ results, so you can compare right away with one click. Tripadvisor Flights also has some helpful search options up front, like a checkbox for prioritizing nonstop flights.

Best Feature: Tripadvisor’s flight search tool is unique from others in that it offers review-based FlyScores of airlines alongside their fares, so you’re less likely to book with an obscure, poorly rated airline without realizing it.

Best Flight Booking Site for Environmentally-Conscious Flyers: Skyscanner

Skyscanner is a popular metasearch site that works with hundreds of other travel providers to find the best fares. You can specify nonstop-flights-only right from the homepage, and there’s also a handy “everywhere” option if you don’t have a particular destination in mind and want to see what’s available. Search results show the “best” option (based on a combination of price and speed) as well as the fastest and cheapest, and you can filter by airline, alliance, number of stops, and flight times. When you select a result, you’ll see a variety of places to book that particular flight. Skyscanner casts a wide net, so you’ll often see very cheap fares from booking sites you’ve never heard of; to help you figure out how trustworthy they are, Skyscanner shows user star ratings for each.

Best Feature: For flyers concerned about the environmental impact of their travel, Skyscanner has a unique “Greener flights” filter, which shows only itineraries with lower-than-average CO2 emissions based on your search. The site also highlights certain itineraries in your results as a “greener choice.”

Best Flight Booking Site for Flexible Travel: OneTravel

OneTravel has a similar interface to CheapOAir, with a convenient chart prioritizing the best nonstop flight options at the top of the results page. The search results automatically populate similar but cheaper flights on alternate dates close to the user’s original search date, which is great if there is flexibility in your plans. If you are committed to your arrival and departure dates, however, you can toggle off alternate dates in the filters section. One major drawback: OneTravel charges a steep service fee of up to $50 per ticket.

Best Feature: The search results page is subdivided into Recommended, Cheapest, Shortest, and Alternate Date tabs, making it easy to find exactly what you’re looking for at a high-level and continue to filter down from there.

Best Flight Booking Site for People on a Budget: Travelzoo

Travelzoo is quite different from the other sites listed here. Instead of booking specific itineraries, you can search broad timelines (this week, next month, this summer, etc.) for deals in your desired destination by either month or season. This makes Travelzoo a good fit for people with a budget and time frame, but no firm idea of when or even where they want to go. The downside is that if you do have specific plans in mind—for example, you need a flight to Omaha in March—Travelzoo is not likely to be helpful.

Best Feature: Travelzoo’s flexibility requirement can afford some great deals you won’t find elsewhere, like cheap business-class flights and multi-city itineraries that will make a dream trip a lot more affordable than you’d think.

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Best For Where You Don’t Care Where You Go, You Just Want a Good Price: Google Flights

Google Flights is a powerful, simple metasearch site that comes free of ads and distractions. After you enter your departure and arrival airports, the calendar pre-populates with prices so you can target dates with lower fares. Once you have your results, you can track fares on your selected dates and receive updates by email. You can also view fares over various dates using the “Price Graph,” which shows you a bar graph that makes it easy to see when the lowest fares are available.

Best Feature: Instead of putting in a certain city as a destination, you can put in a larger region such as Europe or South Africa. You’ll then see fares to various cities within that region displayed all at once on a map. This can be helpful if you want to go to Europe in April, for example, but don’t have a particular destination in mind.

Best Flight Booking Site for Filtering: Kayak

Often imitated and frequently duplicated, Kayak was a game-changer when it launched back in the mid-2000s. And it’s still one of the most powerful metasearch tools available. You can also set up fares alerts to track prices over time. The interface is noisier than Google Flights thanks to a preponderance of ads, but still easy to use. Like Google, it has a flexible search feature that lets you search for good deals to a region like Europe or even simply put in “anywhere.” Another handy feature available on many itineraries: an “Our Advice” box that lets you know whether you should buy now or wait, depending on whether Kayak thinks fares will go up or down over the next seven days.

Best Feature: Its Hacker Fares claim to piece together separate one-way tickets, potentially saving you money compared to similar itineraries, and its wide range of filters, sorting options, and predictive technologies put a lot of tools at travelers’ disposal.

Best Flight Booking Site That Included Southwest: Momondo

Like Kayak, Momondo is a metasearch site that takes you to other sites to make your purchase. One plus: Momondo surfaces results from Southwest, including flight times and other details from the carrier … but no prices. Only by clicking through to Southwest could I see the fare. Still, it’s nice to have a reminder that Southwest is an unlisted option. Another plus: Momondo searches for fares from a ton of smaller OTAs, which could lead to a deal that other metasearch tools miss.

Best Feature: The mention of Southwest is unique to Momondo.

Best Flight Booking Site for Multi-Stop Itineraries: Nomad from Kiwi.com

Kiwi.com is an OTA like many others; you book directly on the site (as you would on Expedia) rather than being linked off to a different site (as you would on Kayak or Momondo). But what sets it apart is its Nomad search engine, which lets you find cheap itineraries for multi-destination trips. You enter the starting and ending places of your journey as well as the cities where you want to stop along the way, including how many nights you want to spend in each place. Hit “find routes,” and the site will put together an itinerary that mixes and matches airlines and routes for the lowest possible price. (For example, I was quoted a route involving four flights—New York City to Rome to Moscow to Tokyo and back to New York—for a measly $1,031 round-trip.) You can filter your results to weed out routes with multiple layovers or flights that don’t include checked baggage.

Best Feature: This is by far the easiest tool I’ve used to research around-the-world and multi-stop itineraries.

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Best Flight Booking Site for Fare Alerts: Airfarewatchdog

Full disclosure, airfarewatchdog is a sister site to SmarterTravel, so we are slightly biased with this one, but promise it is worth your while. Airfarewatchdog is the best for flexible travelers who are just looking for a great deal on airfare. Search fares from a city, to a city, or you can “ choose an adventure ,” which will show you fares from your city to various hotspots depending on what you are looking for – castles, caves, coffee, you name it, airfarewatchdog will point you in the right direction. Their blog features great travel tips, and one of the best features is the fare alerts you can sign up for. If you know you want to travel somewhere, but all you want is a cheap price, sign up for an alert, and you’ll find out as soon as the price dips so you can book it right away.

Best Feature: The fare alert—it allows you to stop searching daily for that perfect price! Let airfarewatchdog do the work for you.

Best Mobile-Friendly Flight Booking Site: Hopper

Hopper is primarily an app for your phone (although it can be used as a website ) but it is worth putting on here just the same. Have you ever been scared to book a flight because it might go down, or afraid to not book it in case it goes up? One of the features of Hopper that makes it shine is its price predictor, which means you never have to worry about making the wrong booking decision. Another bonus is it shows you the price with all of the fees and taxes included, so there is no sticker shock when you finally go to book. After you search, if you aren’t ready to book, you can set up an alert to watch that trip, dates and all. 

Best Feature: Hands down the price predictor. 

Which Flight Booking Site is Best for Me?

In determining which of these sites are the best ones for you to compare prices with, it’s helpful to determine which sites meet your trip-booking needs. Do you want to clearly see bag fees up front? Do you want an easy “flexible dates” function, or are your dates firm? If your travel plans are loose, do you want to see prices for multiple destinations? Different flight booking sites have different capabilities.

Once you determine which site is worth your time depending on the trip, compare prices with a few to make sure you’re getting the best deal. And always check the airline’s own site: OTAs are good at displaying fees associated with an individual flight, but it’s trickier to compare fare options (classes like basic economy vs. economy) on that flight.

6 Things Not to Wear on a Plane

Lastly, it’s important to remember that this list can be separated into two main types: booking sites (also called OTAs) that you book directly with as a third party, and aggregators otherwise known as metasearch sites that’ll send you to a booking site to make your transaction. The latter are better if you want to use any frequent flyer programs you might belong to and acquire points.

Editor’s note: This story was originally published in 2019. It has been updated to reflect the most current information. Sarah Schlichter and Megan Johnson  contributed to this story. Some of the links featured in this story are affiliate links, and SmarterTravel may collect a commission (at no cost to you) if you shop through them. As an Amazon Associate, we earn from qualifying purchases.

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We hand-pick everything we recommend and select items through testing and reviews. Some products are sent to us free of charge with no incentive to offer a favorable review. We offer our unbiased opinions and do not accept compensation to review products. All items are in stock and prices are accurate at the time of publication. If you buy something through our links, we may earn a commission.

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How to find cheap flight deals with momondo

• How does momondo find such cheap airfare? momondo searches across hundreds of airlines and travel sites, from major booking sites to individual company sites, to give you as many cheap airfare options as possible. When you conduct a single search on momondo, you can find and compare cheap airline tickets like you’ve done hundreds of searches at once. momondo is completely free to use - with no hidden charges or fees - and the prices you see are never affected by your searches, no matter how many you make. We believe in an open world, where travelling and getting acquainted across borders and cultures is available to us all, so we’re committed to showing you the cheapest flights in our flight finder.
• How do I find the best price on plane tickets? Choose your destination and preferred travel dates, and we’ll provide you with an overview of the cheapest, quickest, and best flights so you can compare prices and book flights with confidence. Flexible on dates? It’s even easier to find cheap flights by using our Price Calendar (found above your search results), which shows you the cheapest travel dates. This is available on all of our most popular flight routes.
• How can Mix & Match save me money? Sometimes you can save money by combining flight tickets from different suppliers, and we call that Mix & Match. This means you can book your outbound flight with one supplier, and your return flight with another. If you can save money by combining tickets from different suppliers, we’ll automatically include this option in your flight results and label it Mix & Match. You’ll have to complete two separate booking flows after you select this deal on our site, but it’s worth it if you can save money over a traditional round-trip with one supplier. It’s an advanced way of getting the cheapest flights even if they’re offered by different suppliers.
• How do I make sure I don’t miss a flight deal? Sign up for Price Alerts on your favourite flight routes and automatically get live price updates, so you can book flights when the price is right. You can do so next to your flight search results or in the profile menu. If you're on our app, you will find Price Alerts in the navigation menu. You can also subscribe to special offers and limited-time flight deals from our partners. Just sign in, go to Notifications in your profile and subscribe to the topics you’re interested in.

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London flights

• Flight Edinburgh - London (EDI - STN) £26+
• Flight Belfast - London (BFS - STN) £28+
• Flight Edinburgh - London (EDI - LTN) £40+
• Flight Glasgow - London (GLA - LGW) £42+
• Flight Glasgow - London (GLA - STN) £43+
• Flight Glasgow - London (GLA - LTN) £43+
• Flight Edinburgh - London (EDI - LGW) £45+
• Flight Belfast - London (BFS - LTN) £48+
• Flight Belfast - London (BHD - LTN) £48+
• Flight Belfast - London (BFS - LGW) £49+
• Flight Belfast - London (BHD - LGW) £49+
• Flight Glasgow - London (GLA - LHR) £69+
• Flight Edinburgh - London (EDI - LHR) £69+
• Flight Aberdeen - London (ABZ - LHR) £70+
• Flight Manchester - London (MAN - LHR) £77+
• Flight Belfast - London (BHD - LHR) £81+
• Flight Belfast - London (BFS - LHR) £81+
• Flight Manchester - London (MAN - LGW) £98+
• Flight Glasgow - London (GLA - LCY) £115+
• Flight Edinburgh - London (EDI - LCY) £117+
• Flight Belfast - London (BHD - LCY) £137+
• Flight Belfast - London (BFS - LCY) £137+
• Flight Leeds - London (LBA - LHR) £193+
• Flight Manchester - London (MAN - LCY) £214+

Amsterdam flights

• Flight Bristol - Amsterdam (BRS - AMS) £59+
• Flight London - Amsterdam (LTN - AMS) £59+
• Flight London - Amsterdam (LGW - AMS) £59+
• Flight Manchester - Amsterdam (MAN - AMS) £60+
• Flight Liverpool - Amsterdam (LPL - AMS) £65+
• Flight London - Amsterdam (SEN - AMS) £71+
• Flight Edinburgh - Amsterdam (EDI - AMS) £72+

Paris flights

• Flight Birmingham - Paris (BHX - BVA) £26+
• Flight Manchester - Paris (MAN - BVA) £26+
• Flight London - Paris (LGW - ORY) £41+
• Flight Manchester - Paris (MAN - CDG) £43+
• Flight London - Paris (SEN - CDG) £44+
• Flight Bristol - Paris (BRS - CDG) £45+
• Flight Bristol - Paris (BRS - ORY) £45+
• Flight London - Paris (LTN - CDG) £45+
• Flight London - Paris (LGW - CDG) £47+

Los Angeles flights

• Flight London - Los Angeles (LHR - LAX) £352+
• Flight London - Los Angeles (LGW - LAX) £355+
• Flight Inverness - Los Angeles (INV - LAX) £435+
• Flight London - Los Angeles (LCY - LAX) £435+
• Flight Edinburgh - Los Angeles (EDI - LAX) £452+
• Flight Manchester - Los Angeles (MAN - LAX) £464+
• Flight Glasgow - Los Angeles (GLA - LAX) £468+

Alicante flights

• Flight London - Alicante (STN - ALC) £35+
• Flight London - Alicante (LTN - ALC) £42+
• Flight Bristol - Alicante (BRS - ALC) £50+
• Flight London - Alicante (LGW - ALC) £59+
• Flight London - Alicante (SEN - ALC) £63+
• Flight Manchester - Alicante (MAN - ALC) £69+
• Flight Belfast - Alicante (BFS - ALC) £69+

Pakistan flights

• Flight London - Karachi (STN - KHI) £386+
• Flight Manchester - Karachi (MAN - KHI) £396+
• Flight London - Lahore (LGW - LHE) £423+
• Flight London - Karachi (LHR - KHI) £426+
• Flight London - Karachi (LGW - KHI) £435+
• Flight London - Islamabad (LGW - ISB) £439+
• Flight London - Lahore (LHR - LHE) £440+

India flights

• Flight London - Mumbai (LHR - BOM) £353+
• Flight London - New Delhi (LHR - DEL) £359+
• Flight London - Kochi (LGW - COK) £389+
• Flight London - Amritsar (LGW - ATQ) £393+
• Flight London - Ahmedabad (LGW - AMD) £401+
• Flight London - Ahmedabad (LHR - AMD) £403+
• Flight London - Bengaluru (LHR - BLR) £408+

Belfast flights

• Flight Manchester - Belfast (MAN - BHD) £40+
• Flight Glasgow - Belfast (GLA - BHD) £45+
• Flight Liverpool - Belfast (LPL - BHD) £45+
• Flight London - Belfast (LTN - BHD) £47+
• Flight London - Belfast (LGW - BHD) £50+
• Flight Edinburgh - Belfast (EDI - BHD) £52+
• Flight Birmingham - Belfast (BHX - BHD) £53+

Glasgow flights

• Flight London - Glasgow (LTN - GLA) £38+
• Flight Birmingham - Glasgow (BHX - GLA) £40+
• Flight Belfast - Glasgow (BFS - GLA) £41+
• Flight London - Glasgow (LGW - GLA) £42+
• Flight London - Glasgow (STN - GLA) £43+
• Flight Belfast - Glasgow (BHD - GLA) £50+
• Flight Bristol - Glasgow (BRS - GLA) £51+

New York flights

• Flight London - New York (LGW - JFK) £272+
• Flight London - New Windsor (LTN - SWF) £281+
• Flight London - New Windsor (STN - SWF) £286+
• Flight London - New Windsor (LGW - SWF) £297+
• Flight Manchester - New Windsor (MAN - SWF) £297+
• Flight London - Newark (LHR - EWR) £314+
• Flight London - New York (LHR - JFK) £325+
• Flight London - Newark (LGW - EWR) £326+
• Flight London - New Windsor (LHR - SWF) £354+

Barcelona flights

• Flight Liverpool - Barcelona (LPL - BCN) £26+
• Flight Nottingham - Barcelona (EMA - BCN) £26+
• Flight Bristol - Barcelona (BRS - BCN) £30+
• Flight Glasgow - Barcelona (PIK - BCN) £33+
• Flight Birmingham - Barcelona (BHX - BCN) £36+
• Flight London - Barcelona (LGW - BCN) £36+
• Flight London - Barcelona (STN - BCN) £36+

Orlando flights

• Flight London - Orlando (LGW - MCO) £305+
• Flight Manchester - Orlando (MAN - MCO) £356+
• Flight London - Orlando (LHR - MCO) £359+
• Flight Inverness - Orlando (INV - MCO) £426+
• Flight London - Orlando (LCY - MCO) £427+
• Flight Aberdeen - Orlando (ABZ - MCO) £439+
• Flight Glasgow - Orlando (GLA - MCO) £451+

Dublin flights

• Flight Birmingham - Dublin (BHX - DUB) £26+
• Flight Bristol - Dublin (BRS - DUB) £26+
• Flight Cardiff - Dublin (CWL - DUB) £26+
• Flight Glasgow - Dublin (GLA - DUB) £26+
• Flight Leeds - Dublin (LBA - DUB) £26+
• Flight Liverpool - Dublin (LPL - DUB) £26+
• Flight London - Dublin (LGW - DUB) £26+
• Flight London - Dublin (STN - DUB) £26+
• Flight London - Dublin (LTN - DUB) £26+
• Flight Manchester - Dublin (MAN - DUB) £26+
• Flight Newcastle upon Tyne - Dublin (NCL - DUB) £26+
• Flight Nottingham - Dublin (EMA - DUB) £26+
• Flight Edinburgh - Dublin (EDI - DUB) £27+
• Flight Newquay - Dublin (NQY - DUB) £34+
• Flight London - Dublin (LHR - DUB) £56+
• Flight Southampton - Dublin (SOU - DUB) £62+
• Flight Aberdeen - Dublin (ABZ - DUB) £72+
• Flight London - Dublin (LCY - DUB) £100+
• Flight Inverness - Dublin (INV - DUB) £103+
• Flight Exeter - Dublin (EXT - DUB) £110+
• Flight Belfast - Dublin (BFS - DUB) £114+
• Flight Belfast - Dublin (BHD - DUB) £188+
• Flight London - Dublin (SEN - DUB) £240+
• Flight Grimsby - Dublin (HUY - DUB) £241+

Berlin flights

• Flight Nottingham - Berlin (EMA - BER) £26+
• Flight Birmingham - Berlin (BHX - BER) £28+
• Flight Manchester - Berlin (MAN - BER) £28+
• Flight Edinburgh - Berlin (EDI - BER) £31+
• Flight London - Berlin (STN - BER) £38+
• Flight London - Berlin (LTN - BER) £59+
• Flight London - Berlin (LGW - BER) £73+

Australia flights

• Flight London - Sydney (LGW - SYD) £573+
• Flight London - Melbourne (LGW - MEL) £625+
• Flight London - Sydney (LHR - SYD) £632+
• Flight London - Sydney (LCY - SYD) £653+
• Flight London - Melbourne (LHR - MEL) £667+
• Flight London - Perth (LHR - PER) £668+
• Flight London - Perth (LGW - PER) £671+

Canada flights

• Flight London - Hamilton (LGW - YHM) £296+
• Flight London - Toronto (LGW - YYZ) £332+
• Flight London - Toronto (LHR - YYZ) £337+
• Flight London - Montreal (LGW - YUL) £348+
• Flight London - Toronto (LGW - YTZ) £348+
• Flight London - Montreal (LHR - YUL) £362+
• Flight London - Montreal (LTN - YUL) £365+

Edinburgh flights

• Flight Belfast - Edinburgh (BFS - EDI) £26+
• Flight London - Edinburgh (STN - EDI) £26+
• Flight Bournemouth - Edinburgh (BOH - EDI) £27+
• Flight Birmingham - Edinburgh (BHX - EDI) £40+
• Flight London - Edinburgh (LTN - EDI) £42+
• Flight Bristol - Edinburgh (BRS - EDI) £45+
• Flight London - Edinburgh (LGW - EDI) £46+

Manchester flights

• Flight Belfast - Manchester (BFS - MAN) £26+
• Flight Belfast - Manchester (BHD - MAN) £42+
• Flight Edinburgh - Manchester (EDI - MAN) £74+
• Flight Glasgow - Manchester (GLA - MAN) £76+
• Flight London - Manchester (LHR - MAN) £78+
• Flight London - Manchester (STN - MAN) £94+
• Flight Newcastle upon Tyne - Manchester (NCL - MAN) £96+

Bangkok flights

• Flight London - Bangkok (LGW - BKK) £444+
• Flight London - Bangkok (LHR - BKK) £455+
• Flight Birmingham - Bangkok (BHX - BKK) £496+
• Flight London - Bangkok (LCY - BKK) £498+
• Flight London - Bangkok (STN - BKK) £517+
• Flight London - Bangkok (LTN - BKK) £529+
• Flight Inverness - Bangkok (INV - BKK) £533+
• Flight Manchester - Bangkok (MAN - BKK) £534+
• Flight Newcastle upon Tyne - Bangkok (NCL - BKK) £553+
• Flight Glasgow - Bangkok (GLA - BKK) £559+
• Flight Bristol - Bangkok (BRS - BKK) £561+
• Flight Belfast - Bangkok (BFS - BKK) £562+
• Flight Norwich - Bangkok (NWI - BKK) £569+
• Flight Edinburgh - Bangkok (EDI - BKK) £576+

Dubai flights

• Flight London - Dubai (LTN - DXB) £181+
• Flight Glasgow - Dubai (GLA - DXB) £203+
• Flight London - Dubai (LGW - DXB) £205+
• Flight Birmingham - Dubai (BHX - DXB) £269+
• Flight Manchester - Dubai (MAN - DXB) £286+
• Flight Belfast - Dubai (BFS - DXB) £295+
• Flight London - Dubai (LHR - DXB) £317+
• Flight London - Dubai (STN - DXB) £320+
• Flight Bristol - Dubai (BRS - DXB) £340+
• Flight Edinburgh - Dubai (EDI - DXB) £358+
• Flight London - Dubai (LCY - DXB) £360+
• Flight Liverpool - Dubai (LPL - DXB) £382+
• Flight Newcastle upon Tyne - Dubai (NCL - DXB) £399+
• Flight Leeds - Dubai (LBA - DXB) £484+
• Flight Aberdeen - Dubai (ABZ - DXB) £498+
• Flight London - Dubai (SEN - DXB) £529+
• Flight Coventry - Dubai (CVT - DXB) £628+
• Flight Nottingham - Dubai (EMA - DXB) £632+
• Flight Southampton - Dubai (SOU - DXB) £676+
• Flight Doncaster - Dubai (DSA - DXB) £714+
• Flight Darlington - Dubai (MME - DXB) £943+
• Flight Cardiff - Dubai (CWL - DXB) £962+

Málaga flights

• Flight London - Málaga (LGW - AGP) £31+
• Flight London - Málaga (STN - AGP) £31+
• Flight Liverpool - Málaga (LPL - AGP) £37+
• Flight London - Málaga (LTN - AGP) £42+
• Flight Birmingham - Málaga (BHX - AGP) £48+
• Flight Bournemouth - Málaga (BOH - AGP) £54+
• Flight Glasgow - Málaga (PIK - AGP) £55+
• Flight Manchester - Málaga (MAN - AGP) £61+
• Flight Nottingham - Málaga (EMA - AGP) £61+
• Flight London - Málaga (SEN - AGP) £62+
• Flight Bristol - Málaga (BRS - AGP) £69+
• Flight Glasgow - Málaga (GLA - AGP) £77+
• Flight Aberdeen - Málaga (ABZ - AGP) £85+
• Flight Belfast - Málaga (BFS - AGP) £89+

Rome flights

• Flight London - Rome (LGW - FCO) £40+
• Flight Manchester - Rome (MAN - CIA) £44+
• Flight London - Rome (STN - CIA) £50+
• Flight Liverpool - Rome (LPL - CIA) £51+
• Flight London - Rome (LTN - FCO) £55+
• Flight Nottingham - Rome (EMA - CIA) £58+
• Flight Manchester - Rome (MAN - FCO) £91+

Lisbon flights

• Flight London - Lisbon (LTN - LIS) £49+
• Flight London - Lisbon (STN - LIS) £62+
• Flight London - Lisbon (LGW - LIS) £65+
• Flight Manchester - Lisbon (MAN - LIS) £88+
• Flight London - Lisbon (LHR - LIS) £92+
• Flight Bristol - Lisbon (BRS - LIS) £99+
• Flight Edinburgh - Lisbon (EDI - LIS) £103+

Europe flights

• Flight London - Málaga (LGW - AGP) £38+
• Flight London - Barcelona (LTN - BCN) £40+
• Flight London - Barcelona (LHR - BCN) £47+
• Flight London - Madrid (LGW - MAD) £63+
• Flight London - Madrid (LHR - MAD) £69+

New Zealand flights

• Flight London - Auckland (LGW - AKL) £600+
• Flight London - Auckland (LHR - AKL) £659+
• Flight London - Wellington (LHR - WLG) £742+
• Flight London - Christchurch (LHR - CHC) £754+
• Flight London - Christchurch (LGW - CHC) £766+
• Flight Manchester - Auckland (MAN - AKL) £771+
• Flight London - Wellington (LGW - WLG) £784+

Newquay flights

• Flight London - Newquay (STN - NQY) £26+
• Flight London - Newquay (LGW - NQY) £84+
• Flight Edinburgh - Newquay (EDI - NQY) £90+
• Flight Manchester - Newquay (MAN - NQY) £101+
• Flight Glasgow - Newquay (GLA - NQY) £112+
• Flight Leeds - Newquay (LBA - NQY) £172+
• Flight London - Newquay (LHR - NQY) £176+

Aberdeen flights

• Flight London - Aberdeen (LTN - ABZ) £59+
• Flight London - Aberdeen (LGW - ABZ) £73+
• Flight London - Aberdeen (LHR - ABZ) £74+
• Flight Edinburgh - Aberdeen (EDI - ABZ) £145+
• Flight Manchester - Aberdeen (MAN - ABZ) £152+
• Flight Bristol - Aberdeen (BRS - ABZ) £161+
• Flight Newcastle upon Tyne - Aberdeen (NCL - ABZ) £181+

Frequently asked questions

What do i need to know before booking a flight.

There are various factors to consider when booking a flight including cost, fare classes, baggage policies, the complications of flying long haul, and complying with airport regulations. To make your booking journey smoother KAYAK has developed a comprehensive flight guide including insights on finding affordable flights, packing efficiently, and utilising the best travel tools.

What is the cheapest day of the week to book a flight?

The best day to book your flight depends on a number of factors, but there are general trends that you can follow to increase your chances of cheaper plane tickets. Based on an analysis of KAYAK data for all flights departing from inside United Kingdom over the last 12 months, the cheapest day to fly for domestic flights is Wednesday. For international flights, Tuesday had the cheapest tickets on average.

Which month of the year are flight prices lowest?

It’s well established that flights in the low season are generally cheaper than ticket prices during the high season. That means that knowing which month to find the lowest priced plane tickets will depend heavily on seasonality and your destination. While avoiding peak travel times can help you keep costs down, our data shows that the month with the lowest priced plane tickets for domestic flights based on all searches made on KAYAK in the last 12 months was January, while the most expensive was August. If you’re booking an international flight, then January is the cheapest month to fly and July the most expensive.

When is the best time to buy plane tickets - Last minute or in advance?

Last minute flight deals are definitely up for grabs, but when exactly to purchase your plane tickets will depend on where you’re travelling to and from. Based on all data for flight searches made on KAYAK over the last 12 months, prices for domestic flights remained below the average price up to 1 week before departure. For international flights, deals could still be had up to 1 week prior to the departure date, with prices remaining below average. If you’re flexible, KAYAK brings you both advance and last minute one-way and round-trip flight deals.

Can flying international flights with a layover save money on airfare?

For many long-haul international flights, flying direct is not possible and you will have to fly with stopover. Some routes will offer both and you could consider flying with a stopover for a number of reasons. Firstly, breaking up what would otherwise be a long-haul flight, taking a rest and then completing the journey might make the flight more manageable. Secondly, prices can also be lower than direct flights, so while it might take longer for you to reach your destination, you could save money. We’ve looked at prices over the last 12 months for the 100 most popular international destinations for KAYAK users and on average, prices for non-stop flights were cheaper than flights with a layover.

How does KAYAK find such low flight prices?

KAYAK processes over 2 billion flight queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.

How do I find the best flight deals on KAYAK?

A simple flight search at https://www.kayak.co.uk/flights scans for prices on hundreds of travel sites in seconds. We gather flight deals from across the web and put them in one place. Then on the search results page you can use various filters to compare options for the same flight and easily choose the best flight deal from all of the deals coming straight from the travel sites to your screen, with no extra fee from KAYAK.

How can Hacker Fares save me money?

Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.

Does KAYAK query more flight providers than competitors?

Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy?

KAYAK's flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.

What is KAYAK's "flexible dates" feature and why should I care?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you flights up to 3 days before/after your preferred dates. That way, you can see if leaving a day or two earlier will find you a better deal. You can also select the flexible 'weekend' or 'month' search options to widen your search range and find the cheapest price that works for you.

Search cheap flights with KAYAK. Search for the cheapest airline tickets for all the top airlines around the world and the top international flight routes . KAYAK searches hundreds of travel sites to help you find cheap airfare and book a flight that suits you best. Since KAYAK searches many plane ticket sites at once, you can find cheap tickets from cheap airlines and for trains and buses quickly.

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The 12 Best Websites for Booking Flights at the Cheapest Prices [April 2024]

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Book Direct Through the Airline’s Website

4. priceline, 8. skyscanner, 9. travelocity, 10. google flights, 11. cheapoair, price comparisons, final thoughts.

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Searching for a flight can be a bit overwhelming. There are so many factors: dates, times, price, fare class, airline, and more. Even when you know exactly when and where you want to fly, where should you look for the absolute best price?

Unfortunately, no website consistently has the lowest prices. Most of the popular OTAs (Online Travel Agencies) are usually in the same ballpark for the price, but not all offer the same benefits or search functionality.

We’ve combed through many popular OTAs to compare prices and show you the benefits and drawbacks of each site.

More often than not, booking directly through the airline’s website will give you the best price, or will at least be the same as the OTAs.

Some airlines, like Southwest, won’t even show up on sites like Expedia or Orbitz, so you have to book direct. It can also be the most simple way to book. If a problem arises, you don’t have to deal with a third party to get it resolved.

Another reason to book directly through an airline’s website is to use those frequent flyer miles — hooray for award flights!

Of course, to book through the airline’s website, you first need to know which airline has the best prices. There are lots of travel search engines and OTAs that can help you find the best deals so you know which airline’s website to visit. Some OTAs even offer perks that might make it worth booking someplace other than the airline’s site.

Hot Tip: A card such as The Platinum Card ® from American Express earns an impressive 5x Membership Rewards points per $1 spent on flights booked directly with airlines or with  AmexTravel.com on up to $500,000 on these purchases per calendar year.

Momondo is a travel metasearch engine similar to Kayak. The home page displays a simple search box where you can plug in your travel details.

One of the things we love about this site is the visual way it shows you the price trends for your flight. At first glance, you can tell if you could save some money by shifting around your travel dates a bit. It also offers a price tracker and lots of filtering options on the left-hand side of the screen.

Pros and Cons of Momondo

• Great price tracking tools
• Mix & Match fares require you to make 2 separate reservations; this is usually handled “behind the scenes” on other websites

Hot Tip: We cover the ins and outs of finding cheap airfare with this website in our guide to using Momondo .

Kayak is not an OTA. Rather, it’s a travel search engine — making it a great place to start your flight search.

The site compares prices from many websites in a single spot, so you can easily see the cheapest options . Most of the time, you’ll click through to a different site to complete your booking.

Kayak offers the ability to combine 2 one-way tickets (usually on different airlines) in 1 itinerary, which is a great way to save money on your flight. These itineraries can be pretty good deals and something that doesn’t always appear in search results of other websites.

A couple of new features were introduced in early 2024 — Kayak PriceCheck and Ask Kayak. Kayak PriceCheck allows you to upload a screenshot of an itinerary in the Kayak app, and Kayak will compare it to prices on hundreds of other sites to ensure you’re getting the best deal. Ask Kayak is an AI tool that helps you personalize your travel planning.

Pros and Cons of Kayak

• Ability to combine 2 one-way flights on a single itinerary
• Price Alerts to keep an eye on flight prices
• Kayak PriceCheck
• Kayak offers the most benefit when your travel plans are very flexible; many of its most valuable tools help you search for deals, so this site might be less appealing when you have a specific flight in mind

Bottom Line: For more information about Kayak’s travel search tools, check out the complete guide to booking travel with Kayak .

Daily Deals Special: Click here for up to 40% off at Expedia

Expedia is another tried-and-true OTA that people have been using since the 1990s. Back then, Expedia was a go-to source for searching and booking flights. But how does it stack up now?

You aren’t necessarily getting a better deal booking through Expedia, but you aren’t paying any more than you might on the airline’s website.

A nice perk of using Expedia is that it offers a rewards program called One Key. This program offers member pricing plus the ability to earn points for flights, hotels, car rentals, cruises, activities, and more.

The One Key loyalty program is also used by Hotels.com and Vrbo.

If you’re a member of an airline’s frequent flyer program, you’ll be happy to know that you can still earn airline miles on a flight booked through Expedia . However, you often won’t be able to earn miles/points toward status or be eligible for seat upgrades.

Pros and Cons of Expedia

• Earn and redeem points through the One Key program
• Booking through Expedia may limit your mileage earned toward elite status
• Your ability to be eligible for upgrades can be limited when you book through Expedia

Hot Tip:  For more information, check out our post about how to use Expedia to find great deals on flights, hotels, vacation packages (and more).

Priceline is a popular OTA that introduced the Name Your Own Price tool and opaque bookings. These types of bookings can offer discounts, but many of the details are hidden until after the booking. The Name Your Own Price tool was discontinued for flights in 2016, so now Priceline operates like most other OTAs .

One of the nice things about searching for flights on Priceline is that it has a nice color-coded calendar, so you can easily see which days offer the lowest prices.

The search results on Priceline are clear and easy to navigate. As you scroll through your search results, you can easily see the cheapest nonstop options and things like flights with no change fees or early bird flights.

Another way to save money is by looking at Priceline’s Express Deals . These opaque bookings are ones where select details of the flight (like the departure, arrival times, or even the airline) are hidden until the booking is complete.

Pros and Cons of Priceline

• Express Deal flights can offer a good discount if you have some flexibility; many of the details of the flight, including airline and arrival and departure times, are hidden until the booking is complete
• Color-coded calendar and easy-to-read search results
• Price Match Guarantee
• Free online cancellation within 24 hours of booking (except for Express Deal flights)
• No rewards program
• Express Deal flights can be good deals, but they can sometimes be even more expensive than a standard booking

Bottom Line: For more information, check out the complete guide to booking travel with Priceline .

Daily Deals Special: Check out Orbitz’s Daily Deals

Orbitz is another reliable OTA that has been around since 2001. One thing that makes this site a little different is that it offers its own rewards program called Orbitz Rewards . You can earn Orbucks when you book hotels, flights, and vacation packages through Orbitz. However, you can only redeem Orbucks for hotels.

When booking a flight through Orbitz, you’ll earn 1% of your purchase price back as Orbucks (or 2% if you use the Orbitz mobile app). If you book a $500 flight, you will earn 5 Orbucks, which is worth $5 toward a hotel booking. Joining the Orbitz Rewards program is free.

Unfortunately, Orbitz sometimes charges a 1% booking fee . Keep an eye out for these on your trip summary page before finalizing your purchase, and factor them into your calculations to see if you’re getting a good deal or not. While earning Orbucks is great, paying a booking fee could wipe out all of the benefits.

Pros and Cons of Orbitz

• Orbitz Rewards lets you earn Orbucks that can be applied to hotel bookings
• 24-hour cancellation policy
• Low Price Guarantee: if you find a lower price for your flight on another website within 24 hours, Orbitz will refund the difference
• Flight booking fees

Bottom Line: For more information, check out our guide to booking travel with Orbitz .

Agoda is an OTA owned by Priceline. This website doesn’t offer much more than a simple search with limited filter options when looking for flights. If you’re looking for unique accommodations such as an apartment or private villa, Agoda is worth checking out, but it doesn’t offer much when searching for flights.

One cool thing about Agoda is that the site is multilingual. You can select your language by clicking on the flag in the top menu bar.

Pros and Cons of Agoda

• Simple search functionality
• Multilingual option
• Limited filtering options for flights

Hot Tip: Agoda has a loyalty program called VIP, but it only applies to hotel stays. For more information, check out our guide to booking travel through Agoda .

Special: See these Hotwire Flight Deals

Hotwire is a popular OTA that has been around for almost 20 years.

The simple home page offers the main search box to input your departure and arrival cities as well as your desired dates of travel.

Hotwire can offer a great deal when booking a hotel along with your flight . Many times during the booking process, you’ll see pop-ups or prompts advertising great savings when booking a hotel at the same time. We tested it, and every time we priced out a Hotwire vacation package deal against purchasing a flight and hotel separately, the package deal was cheaper.

Bottom Line: If you need a hotel in addition to your flight, booking both together through Hotwire can save you money.

Another thing to remember when using Hotwire to find great flight deals is that sometimes a booking fee will be charged.

Pros and Cons of Hotwire

• Package deals that include a hotel stay can save money
• Low Price Guarantee
• Hotwire can sometimes charge a booking fee

Bottom Line: For more details about finding great deals, check out our complete guide to booking travel through Hotwire .

Skyscanner is another travel search engine that does not sell flights directly. It shows you a list of flights and links to the airline’s website or OTA to complete the purchase.

This site excels for travelers with flexibility . In the search box, you can select Explore everywhere  to search for the cheapest destinations on your chosen dates.

If you have a set destination with specific dates, Skyscanner operates like most other travel search sites.

Pros and Cons of Skyscanner

• Flexible searches, including Explore everywhere  and Multi-city search
• Easy to change language and currency
• Price alerts

Hot Tip:  For more information, check out our in-depth piece on Skyscanner . 

Travelocity is yet another OTA that has been around for a while and is very similar to the other websites we’ve been looking at.

On the plus side, there are some nice filtering options to help you find the best flight for your needs. On the downside, prices can change between selection and booking. We did a dummy booking, and by the time we got to the payment section, the flight price had gone up from $157 to $338!

Much like other online travel agencies, Travelocity can also charge booking fees, so keep an eye out for those in the payment section of the booking process.

Pros and Cons of Travelocity

• Price Guarantee: If you find a lower price on an identical itinerary within 24 hours, Travelocity will refund the difference in price
• Free cancellation on flights within 24 hours of booking (on most airlines)
• Travelocity sometimes charges a booking fee
• Prices can change between flight selection and payment

Bottom Line: For more information, check out our guide to booking travel with Travelocity .

Google Flights is not an OTA. Rather, it’s a metasearch engine similar to Kayak. Once you find a flight, Google Flights will link you to the airline’s direct website or an OTA to complete the purchase. It is a powerful search engine built on the ITA Matrix , which was originally developed for travel agents.

This site shows you price trends and how your travel dates could affect the cost of your ticket. Plus, it allows you to track the prices of a route , so you can jump on low prices when they pop up. These features make Google Flights a great tool to help you feel confident that the price you’re getting is a good deal.

Google Flights recently rolled out a price guarantee feature on select flights departing from the U.S. If you book a flight with the price guarantee badge and the price drops, you’ll get a refund of the difference (with a maximum of $500 per calendar year) from Google Flights via Google Pay. However, you can only receive up to 3 price guaranteed refunds at any one time.

Pros and Cons of Google Flights

• Price graph shows you the pricing trends for your route and allows you to see what days might be cheaper to fly
• Price tracking will send you an email when your flight’s price increases or decreases
• Automatic price guarantee on select flights
• Since this search engine is so powerful with lots of options, it could get complicated for a novice traveler

Hot Tip: You can earn frequent flyer miles on flights booked through an OTA, but you might not earn miles toward elite status.

CheapOair is an OTA that offers its own credit card. Before applying for the card, we recommend considering a better travel rewards credit card  for more lucrative and flexible travel rewards.

This site might not be as cheap as you would think. That’s because it can charge expensive “agency fees.” For most flights, the fees can be up to $35; however, once you read the fine print, you’ll see they can actually be as high as $200 per ticket!

In addition, CheapOair charges a fee to change or cancel any ticket, including within 24 hours, which is free on many other sites.

Pros and Cons of CheapOair

• Price Match Promise: CheapOair will refund the difference in price if you find a lower price on the same itinerary on a major OTA within 24 hours of booking
• CheapOair charges hefty booking fees in addition to fees to cancel or change your flight
• Price Match Promise is very limited; the guarantee is only good for identical flights on Expedia, Orbitz, Priceline, and Travelocity

Bottom Line: CheapOair might not be cheap after all. It advertises low base fares, but it charges booking fees, which usually result in a higher price than the airline’s website. For more information, check out our guide to CheapOair .

Hopper is an app that tries to predict the right time to buy a flight. It claims that using its app can save you up to 40% on flights. The simple interface and color-coded map show you the cheapest and most expensive times to fly to your chosen destination.

You can also set up alerts to watch the prices for your specific dates or watch a whole month if you have flexible travel plans.

Pros and Cons of Hopper

• Easy to use
• Choose to watch prices for a specific trip or choose to watch prices over a whole month
• No ability to search on a desktop
• Few filtering options

Hot Tip: There are many credit cards with travel insurance and extra protections like trip interruption and cancellation protection and baggage delay coverage . We suggest looking at Chase credit cards or Amex credit cards for great insurance coverage.

We searched for a flight from Los Angeles (LAX) to New York City (JFK) across different travel booking websites to compare pricing head-to-head. Below is the cheapest ticket each website offered.

In this search, we weren’t taking anything other than price into consideration. When you are actually booking a flight, there will most likely be more factors that go into your decision of which flight to book.

In this example, Google Flights, Hopper, and Priceline tied for the cheapest flight cost with Expedia, Hotwire, Orbitz, and Travelocity coming in just $3 more expensive. CheapOair was by far the most expensive option.

There is no one-stop shop to find the lowest prices on a flight every time. Most OTAs are in the same ballpark when it comes to price.

If you’ve got some flexibility, many of these sites can help you find the lowest-priced travel dates and destinations.

If you prefer a more traditional booking, start out with a travel search engine like Kayak or Google Flights to search all of the other sites. That will give you a good idea of the best website to use to save the most money on your next flight.

Are you a student? Don’t miss our guide to the best websites for cheap, discount student flights .

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Frequently Asked Questions

What is the best website to use to book the cheapest flights.

There is no single website that has the cheapest flights all of the time. Most of the travel search engines and online travel agencies all have similar pricing, however you can find some really nice deals when looking at opaque (hidden) bookings or vacation packages.

What is an opaque booking?

An opaque booking hides many of the flight details, including arrival and departure times and the operating airline, until your booking is complete. Many sites including Hotwire, Orbitz, and Travelocity offer these types of bookings.

Will I earn frequent flyer miles when I book through an online travel agency?

Generally, yes, you will still be able to earn frequent flyer miles on flights booked through an online travel agency. However, miles earned to qualify for elite status may be not be awarded unless you book directly through the airline’s website.

What are the best websites to buy cheap flights to Europe?

Your best bet would be to start with a travel search engine like Kayak or Google Flights. You will be able to see prices from many different websites in one place and you can track flight prices to help determine the best time to purchase tickets. Be sure to check out our guide to the best websites to book European vacation packages if you want to bundle your flight with a hotel and/or rental car.

Is it cheaper to book directly on the airline's website?

Often, an airline will offer the lowest prices through its own website. However, you can often save money booking through an online travel agency (OTA) that has the ability to combine flights from more than 1 airline into a single itinerary.

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About Katie Seemann

Katie has been in the points and miles game since 2015 and started her own blog in 2016. She’s been freelance writing since then and her work has been featured in publications like Travel + Leisure, Forbes Advisor, and Fortune Recommends.

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The 10 Best (and Worst) Airfare Search Sites for 2024

Frommer’s regularly pits the best airfare search engines, aggregators, and booking sites against each other in a battle royale to see which can find the lowest price on more than two dozen identical searches for flights. 

This year’s results bring new discoveries. We are excited to announce that none of our new top three—the best of the best—is a household name. We are equally excited to discover that if you’re specifically looking for a last-minute deal on airfare, a fourth website, one that’s not even in our top three, is the best choice. And two former airfare search sites fell out of our Top 10 entirely: This year, both Booking.com and FlightNetwork failed to take off. As for the rest of our Top 10, each one has its pluses and minuses, which we’re about to reveal in our reviews below.

On this year’s list, two sites that previously languished in the bottom half of the reviews have upped their games and zoomed into the top ranks—and one former low performer improved so much that it nabbed the top slot.

We have winnowed down a wide field to the 10 best airfare sites for 2024. Here they are.

We tested 15 sites on 32 itineraries, trying both last-minute flights (leaving in a week) and APEX fares (booked three months out). We covered major gateways (NYC to LAX, LAX to Hong Kong, NYC to Paris) and secondary ones (Philly to Tampa, Chicago to Rome, Miami to Rio). We threw in a curve ball (Dallas to Dubai) and included a flight with no North American legs (London to Barcelona) to see how well each handled Europe‘s wilderness of low-cost carriers.

We also ignored low fares that would be miserable to fly due to excessively drawn-out layovers, too many stops, or flying long detours just to change planes. Basically, we rejected any itinerary that increased total travel time by more than half. Airlines may think those are viable plans, but we don’t.

We then used a rigorous, weighted scoring system that rewarded three points to any airfare search site that found the best fares, two points for second-best, and so on. We also penalized fares with negative points if the price proved to be higher than the average result from all competitors. Fares within 1% of one another were considered equal.

• An aggregator is only as good as the OTAs it canvasses. There are booking engines that sell tickets directly (Hotwire, Kiwi, CheapOAir, etc.). And then there are aggregators, which are sites that do not book tickets but instead search dozens of other booking engines, airfare sites, and OTAs (online travel agencies) and compile the results in one place; travelers then click through to their selection to make the actual purchase on the third-party site that’s actually selling it.

Some of the booking sites that aggregators show you are safer than others. All quality aggregators will remove unreliable ticket sellers from their searches, but problems can slip through. As you should do when you are referred to any unfamiliar company, always do a quick Better Business Bureau check for an unfamiliar airfare seller and search for complaints and red flags. 

Also, some OTAs are prone to dangling lead prices a few bucks below what they will actually offer once you click through, and some misleadingly categorize “direct” flights—which do actually stop, but don't require you to change planes— as “nonstop.” Because prices can change from moment to moment, even the most honorable aggregator may lead you to a site where you can’t find the airfare you were originally quoted. When that happened to us frequently in our review tests, we let you know.

Aggregator Google may be the Titan of online search, but it fumbles when it comes to airfares. 

Google does have some things going for it. It is unbelievably fast, refreshing results even as you key in destinations or change filters. It displays average prices on a popup calendar when you’re choosing dates so you can see at a glance the cheapest days to fly. It also lets you peruse a price grid and price graph on the results page. 

Google’s flight search features a fabulous “Explore” feature that allows you to select major city pairs and find the lowest fare for your dates (plus price trends for the month surrounding it), or just see at a glance how much it roughly costs to fly from your designated airport to dozens of destinations. It is also one of only three sites, including our #1, to feature a filter to include fees for checked and cabin bags in the prices. 

So why is the mighty Google at the back of the pack?

Its price results were all over the place. It found the best fare a grand total of one time, flying from Miami to Rio—but four of our top five sites matched it. Then it tanked on rooting out the absolutely lowest fares for two major routes: NYC to Paris and LA to Hong Kong. Its results for pricier direct flights on those itineraries were just average. 

Google frequently found the exact same flight as many other sites did, but at prices just a little bit higher—often just 5% to 15%, but in some cases bafflingly higher, like the last-minute Dallas-Dubai jaunt on Emirates; Google wanted $673 more than our price champion for that flight, and around $250 more than several other sites found.

After quietly doing away with its Hot Rates (deeply discounted opaque airfares), Hotwire fell out of our ranking after 2017. Now it’s back, but with a huge caveat: Never use Hotwire for last-minute fare. 

Hotwire performed, by far, the worst of any site we tested at last-minute prices, chalking up the highest airfare a whopping six times. The two better-than-average rates it did find were balanced out by a pair of worse-than-average ones on other itineraries. 

Hotwire made up some ground by being flatly average when it came to booking farther in advance. It never found the cheapest overall fare, but it often nabbed lower or even the lowest rates on direct flights.

Beyond that, it failed pretty hard, and we think we know why. Hotwire was the only site that missed big chances to bring no-frills carriers into the mix. On New York–to-Paris, it found a decent $745 fare on Scandinavian, albeit with a stopover—but everyone else found a direct Flybee flight for even less ($666–$687). The best Hotwire could muster for a direct flight: $987 on Norse.

More egregiously, because Hotwire only searches one airport at a time by default, it missed lots of cheaper no-frills flights that were available at nearby alternate airports. Because of that blind spot, Hotwire insisted on a British Airways fare for our London-Barcelona hop that actually cost around four times more than booking a combo of no-frills RyanAir, easyJet, and Vueling from other airports in London—a tactic every other site knew enough to include in results. Hotwire pulled the same face-plant on last-minute fares on the same route; the Air France tickets it offered us cost twice as much as the low-cost carriers in that scenario.

Another mark against Hotwire is its poor set of filters. Along with other problems, it offered no way to indicate a maximum total flight time or layover duration you’d be willing to deal with. That’s pretty much a standard sidebar slider everywhere else. We did like the way its showcases, above the results, how much it would cost to fly on three days to either side of your chosen date.

By the way: If you’re wondering why Expedia (and its corporate siblings, Orbitz and Travelocity) is not on this list, it is because those results are all right here in Hotwire. Expedia now just uses the Hotwire engine for its airfare functions, so if you search Expedia now, you’ve searched Hotwire.

This year,  Hopper , the travel app with an intuitive and colorful interface, tumbled five places from #3. 

When it came to finding cheap airfares, Hopper was a mixed bag. It did well enough on advance-purchase APEX fares, scoring slightly better prices than average about a third of the time. But that decent performance was counterbalanced by a dismal performance in the last-minute category. Hopper got whatever is the opposite of a silver medal, second only to Hotwire in putting up the worst prices the most often. Oddly, the only place where it fared better than average was on our curveball Dallas-to-Dubai itinerary. 

In terms of utility, Hopper still gives its users advice about the best dates to book based on price trends, but that feature used to offer far, far more insight on every flight—it once had bar graphs and historical prices, baggage fees and seat pitches, and the cost of various amenities. Those are all gone, although on the final booking page, Hopper will at least link you to the airline’s own page on baggage regulations and costs (except when that link is broken). 

Some features remain. The calendar for selecting dates is color coded to show the cheapest travel days for two months, so you can easily spot where a bit of flexibility might save you money. In addition to a paltry half-dozen sort-by filters (price, flight duration, number of stops, etc.), Hopper can limit the results to its self-defined categories of Basic (cheapest), Standard (economy fares, but with at least free carry-ons and seat selection), Enhanced (more legroom, priority boarding, free snacks, etc.), plus Premium and Luxury for folks who probably don't need this roundup of the best places to book airfares online. One nice touch: Hopper includes a novel option to limit results to flights with no change fee.

Speaking of fees, Hopper sure does like to pressure you to pay a lot of them for its own add-on services, like freezing a fare for up to 21 days for a sliding scale cost, plus flight protection and cancel-for-any-reason insurances—each of which Hopper, annoyingly, makes you decline on two screens in a row before you can proceed. (On that note, for security’s sake, we always recommend you buy travel insurance from a third party, never from the provider who sells you the trip, in case that provider becomes unreachable.)

We’re not sure what happened to the Czech booking site Kiwi.com to make it tumble from #2 to #7 in less than two years, but the numbers don’t lie. Most of its fares were just a little above or below average, though it did find the cheapest last-minute flights from Miami to Rio and Chicago to Rome. 

What tanked its score was twofold. It performed poorly on advance-purchase direct flights (out of eight itineraries, it scored under average three times and worst of all another three). Kiwi did come up with the cheapest overall fares on NYC to Paris and L.A. to Hong Hong with connecting flights—but then so did most of the sites that outranked it.

Kiwi does have some features to recommend it. It caters to travelers who can be flexible. The default departure date is "anytime," allowing you to see which days are cheapest, and once you do choose a date, pop-up calendars show indicative prices for every day over two months. The results page has a fare grid for three days to either side of your chosen dates, and a trends bar graph showing what prices are likely for a dozen days out (and you can scroll even earlier or later). It’ll even throw in train and bus options, if available, which on our list is unique to Kiwi. It also has the second-best set of filters in the game, rivaled only by our #1. 

But there’s a hitch. We must point out that Kiwi does catch some bad reviews for lackluster customer service when something goes wrong. Frommer’s has received complaints about Kiwi from readers, and few rivals would be jealous of its status with the Better Business Bureau, which fields complaints about its Miami office. Bearing that in mind, some travelers may feel more comfortable using Kiwi to find ideal itineraries but then buy them elsewhere. 

The last time we ran our tests, Priceline lost the precarious grip it had kept on the #10 spot for years and fell off the list entirely. During its time in the wilderness, Priceline evidently cleaned up some of its worst practices. It has vastly improved its filters, provided daily price comparisons on the popup date-picker calendars, and no longer turns up its nose at low-cost carriers. That, plus its solid, if not breathtaking, price performance, has placed Priceline back in good graces and firmly in the middle of the pack.

Overall, last-minute fares were Priceline’s biggest weakness, underperforming even our #7 contender, Kiwi, on that score. It was the advance fares that lifted Priceline to #6. It even pulled off a few nice moves. Priceline alone realized you could shave $40 off a CHI-ROM flight in exchange for a short layover in Istanbul. It was also one of only two tested sites to figure out you could save 35% on a last-minute trip from NYC to L.A. as long as you were willing to endure a brief layover. 

Priceline of course also still offers its original, quirky travel hack: The “Express Deals.” These are opaque fares in which you get to pick your airports and travel dates, but not learn precise flight times, airlines, or stopovers until you pay. Before purchasing, you’ll only know whether it’s a morning, mid-day, or evening takeoff and that there will be “0–1” plane changes. If you are willing to put up with that degree of uncertainty, you can save up to 40%, though the discount is typically more around the 10% mark.

Aggregator Tripadvisor  holds its position in fifth place, proving that while it may no longer be just a platform to vent about travel mishaps, but its airfare results are holding steady. 

Tripadvisor offers the clever cost-saving option to include nearby airports—you never know when Newark-to-Fort Lauderdale will cost half a LaGuardia-to-Miami ticket—and its great set of filters includes one that lets you limit the booking sites it checks to only the names you trust.

What’s holding it back at #5—aside from being annoyingly slow—is that whenever it found the cheapest tickets, or even a better-than-average airfare, so did our top three sites. And those higher-ranked sites pulled off this feat even more often. Tripadvisor also turned in a resoundingly meh performance on last-minute airfares, with overwhelmingly average results nearly across the board. 

The highest ranked OTA on our list, CheapOAir reigns supreme when it comes to last-minute airfares. How good are the airfares it sells? A few rivals managed to find the best price one or two times, but CheapOAir did so an impressive six times. 

However, alongside those six wins, CheapOAir posted three prices that were worse than average (but not the worst). You could say it’s all or nothing with these folks—even more so when it came to advance-purchase fares, where CheapoAir’s performance was all over the place. Put it this way: If we ignored its stellar performance in the last-minute category and scored things based only on buying tickets a few months out, CheapOAir would rank 7th, not 4th. 

A few other quibbles: CheapOAir won the booby prize for Most Annoying Popups—pestering us to "Speak to a travel expert" or pick "Air-hotel package or flights only?" to a vexing degree. It was also the slowest of our bunch, and sometimes pretty glitchy. 

On the plus side, the popup date-picker calendars automatically populate with airfare prices for every day, so you can see at a glance which day is cheapest to fly. CheapOAir also had a handy cheat sheet chart at the top of results showing the costs, both non-stop and cheapest, for the best half-dozen airlines. The filters were also pretty good, including options to show alternate dates and nearby airports (both can be great cost-saving techniques).

Always give CheapOAir a look if you are planning to fly in the immediate future—but then also run the numbers at our top three, just in case.

This decade-old upstart quickly outgrew its travel hacker roots to find a comfortable roost on our ranking among the top three—even when we left out the problematic "Hidden city" fares that were once its calling card. 

Hidden city fares—which you can easily exclude by unticking the box next to the word "SKIPLAGGING"—are tedious to explain but boil down to this: They can sometimes cost less, but you don't get to check any luggage. Most crucially, hidden city fares are against airline rules and can result in unpleasant, pricey consequences or even lawsuits if you're caught. But Skiplagged gives you the option to exclude this controversial type of airfare, which we did for our tests. 

Ironically, the site that named itself for a technique that games multi-leg journeys turned out to be strong on direct flights. Our top three sites were pretty much neck-and-neck when it came to pricing (all excellent at the long game, average on last-minute airfares), so it comes down to their other features.

Skiplagged's delightfully simple graphic interface lets you compare, at a glance, the lengths of trips, including layover durations. When you enter a departure airport or city, the arrival is defaulted to "Anywhere;" if you leave it that way, you get a page of photos with prices for a bunch of tempting getaways all across North America (sadly, though, nowhere else).

Skiplagged’s popup calendars show how much the flight costs on each day over two months, so you can easily see how tinkering with the departure or return can save you money. (On the two sites that placed higher in our review ranking, this feature only indicates price ranges, not precise fares).

We do have a few criticisms. Some of Skiplagged’s seemingly low fares from questionable OTAs were actually higher than the competition once you click over and discover service fees and the like. Skiplagged also lacks robust filters, doesn't disclose baggage fees, and rounds down all the prices—that last complaint is minor since we're only talking about a few cents, but just feels sneaky.

Skyscanner remains one of the best performers on price and essentially tied with #3, Skiplagged, in securing the lowest fares on advance purchase tickets. Skyscanner was consistently average on last-minute bookings—but we give it a shout-out for it nailing the cheapest price by far on a quick getaway from Philly to Tampa, even if it was on Spirit. Something else it shares with Skiplagged: mediocre filters.

This time, Skyscanner earned the edge for a few reasons. You can choose "Explore everywhere" as your destination to get a nice grid of destinations and the cheapest cost to get there. Unlike the similar feature at Skiplagged, which is constrained to North America, if you keep scrolling down on Skyscanner, you will get destinations on other continents as well.

This was also one of the first aggregators to include low-cost airlines, and it continues to innovate by including a star rating for all third-party booking sites (and how many users rated it), which helps with vetting unfamiliar OTAs.

Skyscanner offers the option to include nearby airports and to search for destinations in an entire country rather than just a city. While the initial popup calendars for travel dates do not show, as do some others, the precise prices to fly on alternate days, they do indicate each day’s relative cost category via a color code. Then, once you get to the results page, the tiny "Show whole month" link at the top will provide a page with two months’ worth of estimated prices.

Click here for Frommers' Top 10 Ranking of the Best Hotel Booking Sites

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Cheap flights to Moscow

Popular airports near moscow.

• Sheremetyevo - A.S. Pushkin international airport (SVO) Moscow 42 min 27 km
• Moscow Domodedovo Mikhail Lomonosov Airport (DME) Moscow 1 hr 42 km
• Vnukovo International Airport (VKO) Moscow 58 min 28 km
• Zhukovsky International Airport (ZIA) Zhukovskiy 1 hr 10 min 40 km

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Scientists Are Getting Closer to a Real, Working Warp Drive

A crucial development is propelling engineers toward faster-than-light travel.

• If humanity wants to be a spacefaring species, it needs to figure out how to travel faster than the speed of light.
• Now, a new online toolkit — backed up by a $500,000 grant — will help engineers kickstart how humanity can achieve its faster-than-light dreams in reality.
• This toolkit was created by Applied Physics, an international group of scientists, which hopes to also provide a "reality check" on warp drive concepts that rely on exotic physics.

The galaxy—let alone the universe—is a stunningly huge place. Containing anywhere from 100 billion to 400 billion stars (and by extension trillions of planets), the Milky Way is a stunning 100,000 light years across. That means a trans-galactic photon that just exited the Milky Way today likely began its journey when Homo sapiens had yet to migrate out of Africa, and that’s traveling at roughly 670 million miles per hour. Considering the velocity limitations of our rockets, it takes roughly half a human lifetime just to exit our solar system.

Simply put, if humans want to be a spacefaring species, we’re going to need something better than chemical — or even nuclear — rockets, and for decades, it’s science fiction that has held the answer. The most famous example is Star Trek , which relies on the power of its warp drive to traverse the galaxy in a fraction of the time. Galactic journeys that once took centuries could now be wrapped up in a couple of hours.

Scientists have longed for some sort of technology that can propel humans faster than what physics says is possible, and now a new online tool is helping engineers make a warp drive the sole property of Starfleet. Last week, Applied Physics, which is an international group of scientists and engineers, announced that they’d created an online toolkit for “analyzing warp drive spacetimes” called the “Warp Factory.”

“Physicists can now generate and refine an array of warp drive designs with just a few clicks, allowing us to advance science at warp speed," Gianni Martire, CEO of Applied Physics, said in a press statement . “Warp Factory serves as a virtual wind tunnel, enabling us to test and evaluate different warp designs. Science fiction is now inching closer to science fact.”

As Public Benefit Company, Applied Physics is ponying up $500,000 in potential grants for aspiring warp drive theorists. However, those grants come with a few caveats, mainly that the idea is to produce a physical warp drive based in classical relativity, which means not relying on “negative energy or superluminal matter” to make your time-bending engine work.

AP’s Christopher Helmerich, in an interview with The Debrief , also compared the Warp Factory as a “reality check” for warp drives as concepts can be analyzed in a comprehensive way and hopefully weed out ideas that have no chance of operating in the real world.

While a fully working warp drives has many hurdles to overcome, it’s a technology worth taking seriously. Because if humans have any hope of one day exploring distant stars, it’ll need the help of space-bending tech that the newly-minted Warp Factory hopes to nurture.

Darren lives in Portland, has a cat, and writes/edits about sci-fi and how our world works. You can find his previous stuff at Gizmodo and Paste if you look hard enough. 

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When to book flights from Dallas to Moscow

Faqs for booking dallas to moscow flights, do i need a passport to fly between dallas and moscow, which aircraft models fly most regularly from dallas to moscow.

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Dallas to Moscow?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Dallas to Moscow.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Dallas to Moscow?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Moscow from Dallas is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Dallas to Moscow?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Moscow with an airline and back to Dallas with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Dallas to Moscow?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Moscow from Dallas up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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