"Crimson Skies" by FASA was a pretty cool fighter-focused game with a detailed setting.
"Gear Krieg" by Dream Pod 9 had a "Luft Krieg" Supplement. Mostly real WWII planes with a few extra rocket and jet concepts mixed in. DP9 thread>>61843338
If your group wants to play as a bomber crew, there's an old Avalon Hill wargame called "B-17 Queen of the Skies". All the detail of a normal board game focused on getting a single bomber to its target and back. Honestly, if you want detailed air combat rules, wargames in general are the way to go. Just use a universal system for your on-the-ground role playing.
...And of course GURPS has a dogfighting supplement.