kayak.com is a "travel search engine", and if you want excellent travel prices, make kayak your one and only choice. What I like about kayak is that they aren't middlemen and aren't involved at all in selling airfare, hotel stays, etc... Kayak makes their money when someone buys an airplane ticket, etc. and is then REDIRECTED to that airlines website. In other words, kayak is in the advertising business, NOT the travel selling business. Because of this, I am confident that I am getting the best deal when I search for travel using kayak.com. The BEST travel website EVER!