Aerotea
A small project made to familiarize myself with Godot
You can make up your own stories about how the continents are divided, where the large cities are, where people go on holiday.
I put in some airports that act as hubs for others, and some that are dependent on layovers or intermodal transport.
Some of the pilots have trouble with directions and might take the long way around, But I'm pretty sure they'll make it back down.