Well the sky is the limit 
as they say!
So a good idea is to have real time flight tracking information!
Lots of API’s available:
https://developer.flightstats.com/api-docs/flightstatus/v2
https://www.adsbexchange.com/data/
Many even free, see:
https://www.quora.com/Where-can-I-get-free-real-time-flight-tracking-data-via-an-API
So its good case to explore those - who is up for a challenge? Wappler Weekly Challenge #1