It's easy to see how implementing jets and flights could get very complicated, but I think your app needs at least some form of this to be interesting. Consider a basic implementation like this:
Jets belong to users
Owners register their jet at an airport
Travelers select a jet when booking a reservation
As bonuses, jets might have different prices, ratings, reviews, photos, comments, etc. Don't worry too much about making actual route tables with schedules, that's probably overdoing it. Shoot for features that would be fun to write and to use; the sky's the limit here.
Added a Jets table and the ability for owners to register their jets and travelers to select a specific jet as a core feature (phase 5). I have also listed additional jet features as bonuses.
It's easy to see how implementing jets and flights could get very complicated, but I think your app needs at least some form of this to be interesting. Consider a basic implementation like this:
As bonuses, jets might have different prices, ratings, reviews, photos, comments, etc. Don't worry too much about making actual route tables with schedules, that's probably overdoing it. Shoot for features that would be fun to write and to use; the sky's the limit here.