A flight API is a set of programming instructions that allow the software to interact with an airline's systems.

This can include retrieving flight information, checking seat availability, and making reservations. Flight APIs can be used by travel websites and apps to provide their users with up-to-date flight information and the ability to book flights directly through the site or app.

If anyone here is looking for flight API who needs accurate data to analyze or build flight comparison applications. Here is one of the best flight tracking API for this purpose.