Just a point of clarification: planes are always “in the air” during combat phases in Guadalcanal, whether they move or not. I assume you mean that it’s a good idea to move them off carriers or islands where there won’t be any fighting for potential movement flexibility later in the turn.
That is exactly what I mean.
And to be specific be sure to move new fighters off your base in combat movement so they’ll be able to land on carriers in the slot to replace losses or land at your forward airfields.