Flight Data API

It would be interesting to see how the API compares to https://opensky-network.org/apidoc/index.html

Airplanes seen by the OpenSky Network are associated with flight state information derived from ADS-B and Mode S messages. The state of an aircraft is a summary of all tracking information (mainly position, velocity, and identity) at a certain point in time. These states of aircraft can be retrieved as state vectors in the form of a JSON object.

Free, powerful REST API for real-time flight status and tracking information. Live data for flights, airports, schedules, timetables, IATA codes, and more.