This actually isn't so bad, considering it's a 1-person game.
As you progress through the campaign, you get faster planes. By the time I'd beaten the 4th mission, I had access to the RFS69. You just need a fast plane.
I played Factory. I set my wingmen to engage so they'd leave me alone, and I cranked up my throttle and went straight for the base. As far out as you can, start targeting the base. Keep hitting it over and over. You only need to destroy one building.
You can obviously pick a different plane or map. The annoying thing about this is that you have to cross the map. Factory is small enough that even if you get shot down, a fast plane will get you back quickly.