Sarmor, I don't play a lot of air-to-air games, and when I do it is mainly "Check Your Six" run by a friend .However , a few suggestions based on what I know. Tumbling Dice's "Thud Ridge" in their "Wings at War" range seem to have quite a following. They are aimed at their very comprehensive 1/600 aircraft range, and seem to be pretty simple. A starter set of rules and 16 aircraft costs only £10! Wargames Vault sell Rory Crabb's "Target Locked On" and A&A Games "Fox Two Reheat" for $8 and $12 respectively. I have a much older version of the Fox2 rules which I bought after seeing them played at a show many years ago. They have obviously stood the test of time.
Worth Googling reviews of all three to see which best fits your needs.