Is it legal to "buy" a route from another airline?
Example: I see that an airline has just one regional route operating from my hub. I would rather have exclusivity in my hub city, so I offer him 100,000$ to stop operating on this route permanently.
It doesn’t matter if it is legal or not - it is not possible 
As SK, this isent possible.
But just on a side note, this would conflict with the European Trade Law, and as this game being very realistic, I doubt it would be implemented, as it would bring some unrealistic features into the game.
and if it were technically possible, please tell me what airport… 