Maybe, but you mostly pay with time. In research section it is not so relevant, as research projects are fast, and still for some time you don’t have anything to research on, so putting there air research is not hurting a lot.
With trade you need to trade something for. And still flying around Behemoth you still can trade. Only real downside of maintaining aircrafts near Behemoth is that you don’t expand with exploration (unless you have another spare aircraft), thus you don’t get new resources from events.