How Can I Get My Pilot License In Grand Theft Auto San Andreas?

You have to get your flying stats up to 20% or greater in San Andreas to get a pilot license and that's when the gates would open to C.J for all airports. You basically also have to clear the flight school mission successfully to get a license. Besides, improving your stats rating on a particular vehicle would improve it's handling too for C.J. Check out the gamefaqs for more details and hints.

Or you can take a plane from los santos airport and fly around till it says keep flying and you will receive a pilots licence fly till you have 20% that will take 5-10 minutes then you will have access to all airports and all planes and helicopters they will all be unlocked