The Amadeus API is a comprehensive, worldwide flight-search and booking API with SOAP/XML and REST/JSON endpoints. It links you with hundreds of airlines and provides complete flight-offer information, including seat maps, baggage regulations, pricing, availability, and even ancillary services. You can search for one-way, return, or multi-city itineraries, filter by airline codes, d... https://www.adivaha.com/best-flight-apis-for-seamless-integration.html