The Airport API is free API from SITA which can be used to retrieve information about airports.
The API enables you to: - List all major IATA Airports. - Get specific details about an airport using an IATA code. - Get a list of airports matching a given name or code. - Get the distance between two airports
This API is free subject to daily usage not exceeding 5,000 requests. To use the API on a more commercial basis, please contact Jack Loop, email@example.com
Interested developers can apply for an API key and test the API at www.developer.aero.