How about Dive Bomber - yet more Errol Flynn, this time with Fred MacMurray. Glorious Technicolor, made/released 1940/41 prior to American entry into WW2. More Devestators etc than you can shake a stick at and backdrop of San Diego (North Island).
Plot's a bit pants though (Flynn is hunky aeromed researching hypoxia and g-loc; actually that reads better than it's acted).
Look out for plucky medical failure pilot who joins RAF to fly the latest fighter - a camo PT-22