Way this way is not realistic? In Brazil this is the way the most flights are flown. It's strange to me, a Brazilian, to play a game that simulate a airline that can't fly a ABC route, or fly to X via Y. Where you can have pax Flying from A to B and from B to C, or pax flying from N to Y and X mixing the passenger in the same plane. In Brazil all this are very common, specially in the regional airlines that can fly routes bigger indeed, like, ABCD mixing the passengers, or even bigger without mixing the passengers. Sorry for any mistake in my writting, for I don't speak english very well.