KAYAK vs Booking.com.
Same owner, different jobs.

Measured, September 25 to October 1, 2026

What our price data shows

Across our 14 price snapshots of September 25 to October 1, 2026, Google Hotels listed Booking.com as a seller at 5,264 of the 5,830 hotels we priced and KAYAK (any of its country sites) at 1,679. Both were listed at 1,605 hotels, and at 516 of them their lowest prices were the same to the dollar.

Before tax or after

At the 1,350 hotels listing both where taxes and fees added 10% or more to the going rate (the price most sites agreed on), KAYAK's price sat nearer the before-tax going rate at 495 of them and Booking.com's at 83. Where one of the two prices looked before tax and the other after (468 hotels), the before-tax one looked lower at every one. Part or all of such a gap can be tax that is added at checkout, so those hotels are left out of the counts below.

On the same tax footing

Counting only the 934 hotels where both prices were on the same footing (both after tax, both before tax, or no tax showing in the going rates: under 2%, often because no site reported taxes separately), their prices were within $2 a night of each other at 63% of them (585 hotels).

So, on the same footing, KAYAK was cheaper a little more often than Booking.com (188 hotels to 143). When KAYAK was the cheaper one, it was typically 7% below Booking.com; when Booking.com was, 9% below KAYAK. Leaving out the hotels whose going rates showed under 2% tax, 882 hotels remain, where taxes added 10% or more and each price's basis could be read: KAYAK was more than 2% cheaper at 179 of them and Booking.com at 134.

By region, and chain or independent

What the lower price came with: At the 188 hotels where KAYAK was more than 2% cheaper, Google Hotels showed no free-cancellation label or room name on any KAYAK listing; Booking.com's offered free cancellation at 32% and named a room type at 89%. At the 143 hotels where Booking.com was more than 2% cheaper, its listing offered free cancellation at 20% and named a room type at 92%; KAYAK's listings never showed either. Check the room and the cancellation terms before you take the lower one.

The study's own count, on before-tax prices across all 15 snapshots (6,254 hotel prices in 348 cities): some site was 5% or more below the going rate at 4,512 of them, and the lowest price was KAYAK's at 271 of them and Booking.com's at 127.

How we measured: in each snapshot we recorded every booking site's price that Google Hotels showed a US searcher, in US dollars, for a two-night stay checking in between October 30 and November 5, 2026, at 5,830 hotels in 348 cities. For each hotel we took each site's lowest price, all-in with taxes and fees where the site reported them, otherwise its listed rate. Our data keeps one price per listing without saying whether it includes tax, so we infer it: where the hotel's after-tax going rate was 10% or more above its before-tax going rate, a price nearer the after-tax one counts as after tax and a price nearer the before-tax one as before tax; where the after-tax going rate was under 2% above the before-tax one (often because no site reported taxes separately), any two prices count as the same footing; hotels in between are left out. Within $2 means the two differed by $2 a night or less; more than 2% cheaper means one was below 98% of the other. The study's regions put Dubai, Doha, Tel Aviv, Istanbul, Cape Town and Marrakech with Asia-Pacific. A price we saw is one moment, not a completed booking. Method and the CSVs: our hotel price study.

How to use them, in two minutes

1. Use KAYAK or Google Hotels to see who lists your hotel. Both show many booking sites at once; here is which sites Google Hotels showed in our data.
2. Compare the total after tax. On Google Hotels a KAYAK price was often before tax while Booking.com's usually included it.
3. Check the room and the cancellation terms. No KAYAK listing in our data named the room or carried a free-cancellation label on Google Hotels; see whether free cancellation is worth it.
4. Know who you pay. Through KAYAK you usually book and pay the site you click through to; on Booking.com, Booking.com handles the booking.

More from the same price data: KAYAK vs Priceline, KAYAK vs Expedia, trivago vs Booking.com and Priceline vs Booking.com. For each site on its own: is KAYAK legit? and is Booking.com legit?