How about a game where you have to attack and defend "outposts"?
There could be 2-3 outposts/ refueling stations for each side which either need to be captured or bombed (2 hangars?). You could re capture or rebuild the hangars by landing like in a CTC. Which ever team loses all of their outposts and hangars at the same time loses the game.
Maybe the "outposts" could be anti aircraft/anti tank guns (like the tanks in the practice missions) which could be rebuilt by landing. If you were shot down or ran out of fuel you could walk or tank back to the base or outpost to get back in a plane.
Maybe the outposts could also have balloons which, while intact, provide a site radius where your map would show reds in the area.
This could be a good variation if Bombers (slower planes able to carry multiple bombs) were introduced. The slower bombers would be more vulnerable to the A A guns so having fighters and bombers working together would be more important.