In Forza Horizon, and I do expect 2024 to borrow liberally from it because it is very good, an Xbox Studios production, and also an open world sandbox game, you start simple and unlock branching paths based on finishing enough early missions.
So, learn the basics in a 152, and you might unlock various cargo, crop dusting, and passenger missions in all kinds of single engine GA planes. Do enough of those missions and you might unlock single engine turboprops, helicopters, and piston twins and all the beginning missions for those paths… etc.
Soon you will be flying tubeliners and the map will be full of potential missions and completing enough will unlock even more types.
In the FH series, you can either drive to the next mission you choose, or you can fast travel for a fee that is quite expensive in the early game, but then becomes quite affordable as the game progresses.
That’s why I wrote that if you find it necessary, you don’t need to select a new one from your point, you can open the world map and choose a new one anywhere new generated without any problems.
From my understanding and they mentioned this in some videos at the Grand canyon event. When you complete a mission and land at a different destination you make new connections at that destination and unlock new missions which unlock more airports/connections as you keep doing them. So much of the worldmap will be locked/clouded until you progress and travel throughout the world. Ie you won’t be able to fly from NY to London until you have done some domestic airliner missions. You will always have your base airport and area to go back to, but you can also continues from where you currently are in the world. It’s sounds very promising