Expedia Java Library is available on the code library page of Expedia Affiliate Network. Besides this HTTP Java Google request, an additional Java Cheat Sheet could assist in the creation of travel applications. Developers can access the Expedia API that includes enum constants with descriptions and methods with respective parameters and returns.
The Schiphol airport in Amsterdam has published a Flight API for developers to build new, creative passenger experiences. The API provides access to flight and airline data on the more than 90+ airlines that operate at the airport. Examples include flights, airline, status, destinations, and more.
Popcarte is a service for consumers, taking their uploaded photo and turning it into a card of the customer's choosing, from postcards to invitations to thank you notes, to special occasions, and then mails it out worldwide. The Popcarte API lets developers integrate the service into their apps.