The 14 Best Flight Search Sites for Booking Cheap Airfare

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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.

Ranking	Website	OTA/Metasearch
Best Flight Search Site for Comparing Flight Types	Travelocity	OTA
Best Flight Search Site for Comparison Shopping	BookingBuddy	Metasearch
Best Flight Search Site for Transparency	Expedia	OTA
Best Flight Search Site for Nonstop Flights	CheapAir	Metasearch
Best Flight Search Site with Flight Reviews	TripAdvisor Flights	Metasearch
Best Flight Booking Site for Environmentally-Conscious Flyers	Skyscanner	Metasearch
Best Flight Booking Site for Flexible Travel	OneTravel	Metasearch
Best Flight Booking Site for People on a Budget	Travelzoo	OTA
Best For Where You Don’t Care Where You Go, You Just Want a Good Price	Google Flights	Metasearch
Best Flight Booking Site for Filtering	Kayak	Metasearch
Best Flight Booking Site that Includes Southwest	Momondo	Metasearch
Best Flight Booking Site for Multi-Stop Itineraries	Nomad from Kiwi.com	OTA
Best Flight Booking Site for Fare Alerts	Airfarewatchdog	Metasearch
Best Mobile-Friendly Flight Booking Site	Hopper	Metasearch

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.

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.

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.

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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.

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.

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.

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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