Travel reservation site Expedia starting working on its Expedia API back in 2009, according to the changelog. It has three APIs, covering hotels, flights and cars. Don't be shy. Expedia has been expecting you. The Expedia developer site has all the warmth and care of a fine bed and breakfast. They clearly want to invite you in, make you comfortable, and get your development project of the ground. Though they do have a couple hoops to jump through, as well.
U.K. hotel booking specialist LateRooms.com has adopted an “API-first” strategy for feature release and innovation, and has partnered with Apigee to overhaul its approach to website and mobile app development.
Travel booking giant Expedia, through its Expedia Affiliate Network, has launched EAN Rapid, a new platform for travel accomodation search and booking. The platform contains a number of APIs, including Geography, Shopping and Booking APIs, that affiliates can use to build booking applications.