Do cheap flight sites have cheaper fares? We checked 1,644 prices

Not in the way most people think. Cheap flight search sites such as Google Flights and Kayak don’t sell fares at all: they list prices from airlines and travel agencies and send you to one of them to buy. When we checked 1,644 of those prices on 140 itineraries, big agencies such as Priceline, Expedia and Orbitz usually charged exactly what the airline did. Some agency did undercut the airline on 69 of the 95 itineraries both sold, but the median saving was $11, while choosing basic economy or the airline’s standard fare moved the price by a median of $45.

There’s a popular theory that "cheap flight" sites don’t really have cheaper deals, they just have better filters. We tested the price half of it. On November 3, 2026, we collected every booking option Google Flights listed for the five cheapest itineraries on 28 one-way economy searches (14 routes, each on two winter dates), then compared each seller’s price with the airline’s own. Here’s what we found, what it means for where you book, and what you take on when the cheapest price comes from an agency.

Metasearch, travel agency or airline: who actually sells you the fare?

Three kinds of sites show you flight prices, and only two of them sell anything.

Google says Google Flights works with more than 300 airline and online travel agency partners, and that when you click Select you’ll usually be taken to the airline’s website or an online travel agency to finish the purchase. Kayak is explicit about it: as a travel search engine, it doesn’t sell or process tickets or reservations. So a metasearch site can’t be cheaper than the sellers it shows. What it can do is put more of them on one screen.

The line blurs because the same companies often own both kinds of site. Booking Holdings owns Kayak, Momondo and Cheapflights, and also the agencies Booking.com and Priceline. Expedia Group owns Expedia and acquired Orbitz and Travelocity. Skyscanner was bought in 2016 by Ctrip, now Trip.com Group, which also runs the agency Trip.com.

Our data came from one metasearch engine, Google Flights, so it shows exactly what a shopper sees there. Each itinerary had a median of 9 sellers listed, and as many as 28. Across all 140, prices came from 26 airlines and 39 different agencies.

How often was a travel agency cheaper than the airline?

Of the 140 itineraries, 42 were sold only by the airline: Google Flights listed no agency for them at all. Three were sold only by agencies. The other 95 had both an airline price and at least one agency price, and those are the fair comparison.

So when agencies were selling the same flights, there usually was a lower price than the airline’s somewhere on the page. Counted across all 140 itineraries, including the 42 no agency sold, some agency beat the airline on about half of them (69 of 140).

The real question is by how much. When an agency was cheaper, the gap was small:

• Median saving: $11, or 4.2% of the fare.
• Average saving: $14, or 6.6%.
• Most were under $25: 64 of the 69 savings were $25 or less.
• The largest: $100.

For one traveler, $11 is real money, but it isn’t a different trip. And the listed price isn’t always the final one. Google notes that the price it shows covers the flight itself, that extra fees, for bags or credit cards for example, may apply, and that those fees can vary depending on which airline or agency you choose. Compare the final total on the seller’s checkout page, not the listing.

Do Expedia, Priceline and the other big sites beat the airline’s price?

Five of the eight big online travel agencies in our data mostly matched it. Here’s how each one’s price compared with the airline’s cheapest fare on the itineraries it sold:

Between them, Priceline, Expedia, Orbitz, Travelocity and CheapOair listed 244 prices on our itineraries. Of those, 161 matched the airline to the dollar, 19 were lower and 64 were higher. A few patterns stand out:

• Priceline never undercut the airline in our sample. It matched on 39 of 49 itineraries and was higher on the other 10.
• The same owner doesn’t mean the same price. Expedia was cheaper than the airline on 14 of the 57 itineraries it sold, while its sister brands Orbitz (1 of 26) and Travelocity (1 of 56) almost never were. Booking.com undercut the airline on 18 of 31, while Priceline, also owned by Booking Holdings, never did. Prices alone can’t tell us why.
• Booking.com, Kiwi.com and Trip.com were the swing sellers. Booking.com had the biggest typical discount of the big names, a median of $15 below the airline. Kiwi.com never matched the airline exactly: it was cheaper on 27 itineraries and higher on 21. Trip.com was higher more often than lower (24 against 16), with a median of $2 above.
• Some were above the airline more often than below it. Travelocity’s price was higher than the airline’s on 25 of 56 itineraries, and CheapOair’s on 18 of 56.

For Priceline, Expedia, Orbitz, Travelocity and CheapOair, matching the airline’s price was the norm, not the exception.

Which agencies undercut the airline most often?

Most of the agencies that undercut the airline most often weren’t the big names above.

FlightHub and JustFly, first and second on this list, are sister brands: FlightHub’s corporate site lists both as part of its family of brands. Kiwi.com, Booking.com, Trip.com and Expedia are the only names here from the table above.

Two cautions about this list. First, these are counts, not rates: an agency that appeared on more itineraries had more chances to undercut the airline, and the counts don’t account for that. Second, we collected no reviews, complaint records or customer-service data for any seller. A lower price tells you what an agency charges, not how a cancellation, schedule change or refund will go with it. Nothing here rates any agency’s service.

The fare type matters more than the website

The same 140 itineraries also let us measure something bigger. On 101 of them, the airline sold both its cheapest fare (usually called basic economy) and its standard economy fare for the same flights. The standard fare cost a median of $45 more, about four times the median agency saving.

That changes the order in which it makes sense to shop. An $11 discount on a basic fare doesn’t help much if you’ll then pay to check a bag or choose a seat, things the airline’s standard fare often includes. Decide which fare you need first, then look for the cheapest seller of that fare. And make sure you’re comparing like with like: the same flights, the same fare type and the same bag allowance. Google Flights’ Bags filter can add carry-on or checked-bag fees to the prices it shows, which makes that easier.

Our companion study, What it really costs to leave basic economy, breaks the $45 down by airline and works through when the upgrade pays for itself.

What you take on when you book through a travel agency

The price is only part of the comparison. When an agency sells you the fare, it’s usually the company you deal with afterwards too.

• Refunds go through the merchant of record. The US Department of Transportation says ticket agents, including online travel agencies, that are the "merchant of record" must make refunds when an airline cancels or significantly changes a flight to, from or within the US. The merchant of record is the company shown on your card statement for the purchase. DOT advises contacting the agency directly for a refund before contacting the airline.
• The 24-hour rule is an airline rule. DOT requires airlines, for tickets bought at least seven days before departure, to either let you cancel for a full refund within 24 hours or let you hold the fare for 24 hours. That requirement doesn’t apply to bookings made through online travel agencies or travel agents, although DOT notes they’re free to offer something similar.
• Changes follow the seller’s process. Google’s help pages tell travelers to contact the airline or online travel agent they booked with to change or cancel, and note that airlines and online travel agencies make their own rules.
• Some refunds still come from the airline. Per DOT, even if you paid an agency for an extra such as a checked bag, a refund of that fee for a lost or significantly delayed bag is requested from the airline.

None of this makes booking with an agency a mistake. It means a typical $11 saving is a trade: a slightly lower price in exchange for handling any change or refund through a second company, under its policies. When your plans are firm, that trade may be easy. When they might change, it’s worth reading the agency’s change and cancellation terms before you pay.

So, do cheap flight sites have cheaper deals?

Back to the theory: cheap flight search engines don’t really have cheaper deals, they just have better filters. Here’s how it held up.

• "No cheaper deals": mostly right about the search engines. Google Flights, Kayak and the other metasearch sites don’t sell fares, so they can’t be cheaper than the sellers they list. Big names such as Priceline, Expedia and Orbitz usually matched the airline exactly.
• But not entirely right about the listings. On 73% of the itineraries that both sold, some agency was cheaper than the airline. The catch is the size: a median of $11, and $25 or less in 64 of 69 cases.
• "Better filters": we didn’t test that. Our data measured prices, not features. What we can say is that the comparisons that moved the price most, fare type and bags, are exactly what good filters help with. Speed is a tool too: in our October 2026 speed benchmark, every metasearch engine showed its first results in under 3 seconds, while every big online travel agency took 7 seconds or more. Why the biggest travel sites are still the slowest looks at that gap.

The fair summary: metasearch sites are good for finding prices, not for creating them. When a cheaper price exists, it’s usually small, and the sellers offering it most often were smaller agencies.

How to find the lowest real price: a checklist

1. Start on a metasearch engine to see the airline and the agencies selling the same flights side by side.
2. Choose your fare type before your seller. Work out whether you need a checked bag, a carry-on, a seat assignment or the ability to change. That choice was worth a median $45 in our data.
3. Compare like with like. Same flights, same fare type, same bags. Use the Bags filter if you’re bringing luggage.
4. Size up the gap. If an agency is $11 cheaper, ask whether that’s worth dealing with a second company for any change or refund. If it’s $100 cheaper, look more closely at what that fare includes.
5. Check who the merchant of record will be, and read that seller’s change, cancellation and refund terms before you pay.
6. Compare checkout totals, not listings, since fees can differ by seller.
7. Remember the 24-hour rule applies to airline bookings, and an agency may or may not offer something similar.
8. Price your whole party. Our data is for one adult; check the total for everyone traveling.

The day you fly can matter as much as the seller. Our study of the cheapest day of the week to fly covers that.

What this data can’t tell you

This is a snapshot, and it’s worth being clear about its edges:

• It’s a narrow slice. 140 itineraries: the five cheapest on 28 one-way searches, 14 routes, two winter departure dates (January 14 and February 11, 2027). Pricier itineraries, other dates and other routes may behave differently.
• It’s one moment. Prices were collected on November 3, 2026, and fares change constantly. It doesn’t capture sales or mistake fares.
• It’s listed prices. These are the prices Google Flights showed for each seller. We didn’t go through every seller’s checkout, so fees added there aren’t included.
• It’s economy, one adult, one way. Round trips, premium cabins and group bookings weren’t tested.
• It says nothing about service. We collected no data on how any seller handles changes, refunds or complaints.
• It can’t tell you who’s cheapest on your trip. Only a search can.

Where Defera fits

Defera is a different kind of booking option: you book a flight now and pay for it in weekly or bi-weekly payments, with no credit check and no interest. Defera isn’t a lender, and every Defera trip departs at least 22 days out. It also isn’t a way to find a lower fare than an airline or agency; it’s a way to spread out the cost of the fare you choose.

Two things from this study carry over. Defera’s search shows prices with taxes and carrier fees included by default, and the trip total at checkout already includes Defera’s service fee and hold fee, so nothing is added later (what you pay explains each line). And once your booking is approved, the agreed-upon trip price is secured while you stay in good standing on your plan (price protection). As with any company you book through, read how changes and cancellations work before you book; Defera’s are in how to cancel your trip. How it works covers the rest.