Check Your Six! would be the classic. It uses hex mats, but I've played many a game with it and its worth it. It uses move pre-planning and planes will have things like different turn rates and such, meaning that (just as in real life) certain planes benefit from slashing while others want to get into a turning battle. Similarly it also manages to make veteran and ace pilots appropriately difficult to fight, as their skill is both an attack and defense modifier, as well as giving them limited ability to shift their move. Here's a link to the campaign book for Korea. You will still need the core rule book, but otherwise these rules basically carry over to any jet combat scenario, with some modifications for specific planes or equipment being found in specific campaign books. Happy hunting!