My guess is that Skyla is flying people out to that new town just east of the Entralink. It kinda seems like the only way to get there is to fly. Anyway, if she's running an airline service out there, she probably doesn't have time for gym challenges anymore.
Hoping that Skyla does run an airline services, and even lets us to travel to other regions as well. Well, it might not be true at all, but just a wistful thinking...