I think the issue is because real life aviation is much more complex than this game. Ryanair UK is a subsidiary of Ryanair, so it's essentially a different airline which allows them to operate flights like that. Same thing with TUI having subsidiaries in several EU countries which allows them to operate international flights to non-EU countries from that country. The only way to simulate this in the came currently is to have multiple airlines in the same world (when possible) and have them all apart of the same alliance to achieve those connecting passengers that you'd get in the real world.
No, Ryanair UK allows them operate from a Non-EU country to a Non-Eu country, from the United Kingdom which left the EU and the Morroco which is not apart of the EU.
Ryanair’s main AOC is what I am trying to convey here, that because they are registered in Dublin, Ireland with their AOC and Malta with their AOC, they are allowed as any EU airline can such as Easyjet (Switzerland/Austria AOC), Wizz (Hungary AOC) etc, to fly between a country which is a member of the European Union, to another country which is not a member of the European Union.
I’ll simplify this by saying that they are registered in Country A (inside the EU).
and they fly from Country B (inside the EU, but not where they are registered) to Country C (outside the EU).
I took Ryanair as an example of this earlier, but most of you seems to have been confused by it, I’ll try another one then.
Wizz Air together with it’s Hungarian AOC flies from Country B (Italy) to Country C (Albania), or from Country B (Serbia) to Country C (Denmark, Sweden, Germany, France, the Netherlands etc), or from Country C (Israel) to Country B (Romania, Poland, Italy, Austria, etc).
Wizz Air is allowed to do this because of its EU/Hungarian AOC, that allows them to act as if they have a AOC in any European country.
My entire suggestion is just based on allowing us to fly from Country B (inside the EU) to Country C (outside the EU).
Basically allowing us to use the full extent of the 7th freedom of the air. Not only flying within the EU, but also allowing us to fly from within the EU to outside the EU.