KAYAK products include flight, hotel and car rental searches, including additional search features such as multi-city searches, flexible date searches, weekend searches and a large number of filtering tools. The site provides searches for cruise ships, vacation packages and special promotional offers or deals across the websites that it searches. The site also provides a number of other features including: calculating additional fees that may not be included in the listed price, such as extra baggage fees; alerts for price changes based on desired price, destination and date parameters; and mobile applications for iPhones and Blackberry devices.
The TravelPost site includes hotel reviews and hotel information from thousands of online travel sites, hotel sites and review sites. KAYAK also operates an advertising network across its sites and its affiliate sites.