Kayak Software Corp. revealed how critical Google is to the travel-search company’s business in an initial public offering prospectus submitted to the Securities and Exchange Commission on Wednesday.

Google has put another foot squarely in the travel arena with Google Flights, its new airline ticket aggregator. The site has the ITA Software deal to thank for its existance, which was hotly ...

Steve Hafner, chief executive officer and co-founder of Kayak.. Photo: Getty Images Travel is booming, with record numbers of passengers surging through U.S. airports, and Kayak CEO Steve Hafner says ...

In the roughly two years since Google launched flight search and hotel search, Kayak CEO Steve Hafner says, “We haven’t seen any impact on our business.” This statement, made in a CNBC interview, ...