can you explain why realism is the ultimate goal, while you have a ranking and rewards for people who become first in a world, so why isnt the ulitmate goal to make the biggest airline?
You obviously didn't browse through the options in this game, and one of basic things is this - if you want you can always play in "open" worlds where flights that you're talking about are possible and expected, no matter where you're based. In "realistic" world (yeah, not very realistic anyways, but trying to be) political restrictions should simply stay closed for something of this sort. The choice is yours, it's very simple, if you want no restrictions, then don't play in "realistic" worlds!
Anyway, in "realistic" worlds, if you are in any larger country, thousands of planes are not enough to "fill limits of their country", in Russia, Japan or India you can easily have more than 2.000 planes, let alone China, EU and US where finding routes for 5.000 planes (if you don't order only very large planes) is not very hard, so you might try doing that first, find new routes if you're trying to have a seriously big airline in a "realistic" world, and judging from your airlines at the moment you're not near any of the really large numbers.