GameDynamo - "Grand Theft Auto V is the first game in the series to allow players to fly all kinds of aircraft, from helicopters to jets. You can learn how to fly these airborne vehicles at the Flight School in Los Santos International Airport. You can complete these special missions with any character, and completing them will increase your flying skill. To unlock all 13 classes, get a bronze medal on the one before it. To get all the achievements in the game, you’ll need to at least one gold medal here – it will apply to the “Multi-Disciplined” trophy or achievement."