Get the Free Amazon App of the Day - KAYAK PRO. The KAYAK Travel Assistant App connects you to the world's best travel website. You can find the right flight, get the perfect hotel. If your flight is canceled, you can find a new one in a tap of the finger.Also with KAYAK you can compare travel sites in one search when booking your flight, hotel, or car rental. Keep track of your flight, hotel, and car reservations when you are on the move. Be notified of flight delays or when a flight departs or arrives. At the airport, access a map of all the restaurants and ATMs. KAYAK is here to make travel planning and management easy so you can focus on enjoying the trip.