There is tiny print at the bottom of the page on flight information that states:
"We make every attempt to get accurate prices, but prices are not guaranteed."
Then when you click on the 'prices are not guaranteed' there is this link:
Does KAYAK Guarantee Prices?
No, we don't.
This might surprise you, but there is an excellent and logical reason for this. It's rooted in the fundamental nature of KAYAK, which is different than most other travel web sites. In short, KAYAK doesn't set prices, or sell any travel products. KAYAK is a search engine, and, in the same way that Google doesn't guarantee search results are true or accurate, we don't guarantee prices we find.
Now, it's not in our interest to show prices that are out-of-date or in error. If prices we find for you are unreliable, then we're not really saving you much time. You might as well play Ms. Pacman rather than use KAYAK, for all the good we're doing.
So, if you come across a price on KAYAK, and click through to an airline site, and the price is wrong, you're going to be annoyed; maybe even angry. Sometimes people think we are tricking them. But it's completely against our interests, your interests, and the interests of travel sites that KAYAK searches, to show you one price, then 5 seconds later show you the same flight for $134 more. Why would we do that on purpose? It would be silly.
At this point, you may be asking yourself, "Golly, why doesn't KAYAK just find the correct price and show that? How hard can it be?" Ah, there's the rub. It turns out it is a pretty tricky problem, in particular with regard to airfares. We've got this big room full of brainiacs, who think about this all day long, and they are making steady progress. It's slow going, a struggle that we take on airline by airline, route by route.
It's not all gloom and doom, though. You can still save scads of time searching with KAYAK before you decide what to buy and where to buy it, not to mention money. The alternative, searching hundreds of web sites yourself, isn't much fun.
What should you do? We're a little biased, but we think you should use KAYAK to search before you buy. If you run across a bad price, and are feeling charitable, report it to us so we can use the information to improve.
Ever faithfully, your travel minions,
KAYAK