Thanks for the clarification.
I just started playing 2 days ago, got into an alliance and so far going quite nicely. Mostly I was just concerned with this option. I am in a decent alliance but I want to expand more in the US rather than Europe where I believe I will reach my max pretty soon, so an alliance with more presence in the US will help more.
On that note... here's a question. If I pull planes from one continent's routes, can I put them on a different continent? Like for example, if I pull a prop plane with 1500nm range from european routes and I wanna assign it to US routes, would that be possible? I mean, how would the plane actually get to the US to fly those routes? It can't get over the Atlantic on its own

Or maybe I'm thinking too much into this...