Measured, not guessed
Are hotel prices the same on every site?
Close on the big sites. Not across all of them.
No. The big booking sites usually list the same or nearly the same price for a stay, but across every site Google Hotels lists, some site was 5% or more below the going rate at 73% of the 7,044 hotel prices in our study (17 snapshots, September 22 to October 10, 2026, 368 cities), typically 16.7% below, about $23 a night. At 4,294 of those 5,114 hotels (84%) the lowest listing named no room, so whether the lower price buys the same room is usually unknown.
No booking site paid for this measurement; it is published as we found it. If you book through Underbook we may earn a commission, which never changes which rate we show.
What we found, in plain terms
Across 17 snapshots from September 22 to October 10, 2026 (7,044 hotel prices in 368 cities, US market):
How often a cheaper listing exists
- At 73% of 7,044 hotel prices some site was 5% or more below the going rate (61% to 81% in each snapshot)
- Typically 16.7% below the going rate, about $23 a night; Super.com had the lowest listing most often (1,340 hotels)
- At 1,930 hotels (27.4%), no site was 5% or more below the going rate
How often it names your room
- At 4,294 of the 5,114 hotels with a lower listing, the lowest named no room
- The lowest named a room at 820 of 7,044 (11.6%), which is not proof it is yours
- A lower listing with a matching room name: 571 of 6,620 hotels (8.6%) on our original room check, in the 16 snapshots that compared room names
How close each big site sat to the going rate
The going rate is the price most sites agree on. Each big site's lowest price against it, like with like, in our 14 snapshots of September 25 to October 1, 2026 (5,830 hotels):
| Site | Hotels compared | Within 2% | More than 2% above | 5% or more below |
|---|---|---|---|---|
| Expedia | 3,549 | 90.5% | 6.5% | 2.1% |
| Hotels.com | 3,959 | 79.1% | 10.5% | 5.7% |
| Priceline | 3,946 | 64.3% | 28.1% | 4.7% |
| Booking.com | 4,759 | 62.5% | 29.8% | 5.4% |
| Agoda | 3,041 | 60.1% | 22.0% | 13.1% |
So the big sites mostly agree, Expedia most of all. Across every site listed, though, prices were rarely all the same: every listing that could be compared like with like was within 2% of the going rate at only 269 of 5,185 hotels (5.2%), and at 3,965 (76%) at least one site listed the stay 5% or more above it. Some prices on screen are higher than the going rate, too.
Why the big sites land close, and where they don't
It's structural, not coincidence. Hotels distribute rooms to the major channels at aligned rates, and rate parity agreements, contracts that discourage one public channel from undercutting another, plus competitive matching pull the public price together, though not all the way. The big OTAs also share corporate parents: Expedia, Hotels.com, Travelocity, and Orbitz are one company; Booking.com, Priceline, Agoda, and Kayak are another. Much of what looks like comparison shopping is checking the same warehouse through different doors, which is why the price differences you do see are often about fees, currency, or a room the listing never names, rather than a provably cheaper room.
Parity also breaks in the wholesale layer. Hotels quietly release inventory to wholesale channels at lower rates to fill rooms, and resellers like Super.com or Algotels surface those prices publicly. Super.com had the lowest listing most often in our study (1,340 hotels, typically 18.4% below the going rate) and named the room at none; across all sites, the lowest listing named no room at 4,294 of the 5,114 hotels with a lower listing. Most of these listings name no room, so whether they buy the same room is usually unknown, which is exactly why they deserve verification rather than blind trust; we wrote up that class of booking in same room, different price. Opaque products push the same trade to its limit: with Priceline's Express Deals the discount is real, but even the hotel's name stays hidden until after you pay.
What this means for how you book
- 1. Check more than one big brand. Expedia and Booking.com were within $2 a night at 1,797 of 3,056 hotels (59%) where both prices were on the same tax footing, in our 14 snapshots of September 25 to October 1, 2026; the lower all-in price is your baseline. More on the most-listed site: does Booking.com have the cheapest prices?
- 2. When prices are equal, book direct. Loyalty points, easier changes, and better problem-handling are free when there's no price gap to give up.
- 3. Treat wholesale discounts as leads. The lower prices can be real, but verify the room type, all-in total, and cancellation terms before paying.
The comparison that's actually worth doing
Since the big brands don't always agree and the cheaper listing usually names no room, the comparison worth your time runs across every class: the going rate versus every cheaper listing, on an all-in basis, with room matching checked. That's precisely the comparison that's tedious to do by hand, and it's the one a good hotel comparison website should automate. It's what Underbook does. While you shop, our free browser extension checks booking sites for your hotel and dates, and renders an honest verdict: no site meaningfully cheaper (you likely already have a fair price), a lower rate whose room name matches yours, or a lower rate whose room it cannot match, flagged for you to check before booking.
Our own data says the honest verdict will usually be a cheaper listing to check: 73% of hotels had one, and most named no room. We show that plainly. When the lower listing's room name matches, it says so; when it does not, it tells you to check the room; either way you stop re-checking tabs by hand.
Rate parity, common questions
Are hotel prices the same on every booking site?
No. The big booking sites usually list about the same price: Expedia's lowest price was within 2% of the going rate at 91% of the hotels it listed and Booking.com's at 63%, in our 14 snapshots of September 25 to October 1, 2026. But some site was 5% or more below the going rate at 73% of the 7,044 hotel prices in our study (September 22 to October 10, 2026), usually a smaller site, and at 84% of those the lowest listing named no room.
So price comparison is pointless?
No, it is just usually pointed at the wrong target. Even Booking.com and Expedia split: at 3,056 hotels where both prices were on the same tax footing, Expedia was more than 2% lower at 945 and Booking.com at 268. Comparing the going rate with lower listings, and all-in totals rather than headlines, is where real differences live. And comparing across time (watching for drops) often beats both.
Why did I once find the same room cheaper on another big site?
It happens, but it is uncommon: in the 16 snapshots that compared room names, a listing 5% or more below the going rate with a matching room name turned up at 571 of 6,620 hotels (8.6%) on our original room check (952 of 5,830, or 16.3%, on the stricter October 1 check over the 14 snapshots of September 25 to October 1, 2026), and short-lived promotions, member pricing and currency effects create temporary gaps. A lower listing with a matching room name is the exception, not the rule, which is why we run the comparison on every hotel instead of assuming.
Do member prices and app-only deals break parity?
Technically they sidestep it: closed-group rates (sign-in prices, app-only rates, opaque bookings) aren't public rates, so parity agreements don't cover them. They're usually modest discounts (around 10%) rather than the deep wholesale cuts, and they come with their own terms. Worth taking when they're on the room you already wanted.
How big was the study behind these numbers?
7,044 priced hotels in 368 cities, in 17 snapshots from September 22 to October 10, 2026 (stays 21 days out in the first, 35 days out in the rest), US market, USD, every site Google Hotels lists. It replaces a much smaller earlier test, whose parity finding this data does not support. The headline held in every snapshot: a lower listing at 61% to 81% of hotels, the lowest naming a room at 5.9% to 20.4%. Each snapshot is one moment, not a census.
Does Underbook profit from any of these sites?
If you book through Underbook we may earn a commission, but no booking site paid for this study or can buy a place in our results, which is what lets us publish a finding like "a cheaper listing usually exists, but it usually names no room" and mean it. When a booking site Google Hotels lists has a lower price, we show it, whoever it belongs to, and say whether it names your room.
Real prices, hotel by hotel
Every site's price at 5,970 hotels in 368 cities
From our price snapshots of September 25, 2026, September 28, 2026, September 29, 2026, September 30, 2026, October 1, 2026, October 3, 2026 and October 10, 2026: each hotel's page lists every booking site Google Hotels showed, the going rate, and whether the lowest-priced listing named a room, with a button to check today's price for your own dates.
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Know when the price you see is already the going rate.
Underbook checks your hotel across booking sites and gives you an honest verdict: no cheaper listing, a cheaper listing whose room name matches, or an unverified lead worth checking. Free, and you always book where you choose.
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