There is no limit to the use cases of our Flight Schedules API from travel apps and passenger services to simulations and air transportation analysis over the years. We currently offer our APIs to over 6000 clients worldwide that include leading aviation professionals, travel agencies, airlines, airports, independent developers, academics, government bodies, non-governmental organizations and more. The Flight Schedules API data data come in historical, real-time and future versions via 3 separate APIs and it is possible to combine these to expand your time coverage.
Some examples for the use-cases can be:
Source: https://aviation-edge.com/future-airport-schedules-api/