When I buy a chopper in GTA 5 online, I can call Pegasus to get those choppers delivered to an airport or helipad.
Unfortunately, if I get myself next to an airport and call Pegasus, the chopper isn't delivered to the current airport I'm at, but to another one on the map. But they aren't delivered to airports randomly, it seems that each airport corresponds to a specific area where you have to be when you make that call.
Does anyone know these areas (best would be a map with those areas indicated)? Or do you know better and can tell the mechanism?