How to Get a Plane in Grand Theft Auto: San Andreas

Getting A Plane

If you have a car in your garage already, get in it or find a person driving a car on the road and hijack it, then go down to the Los Santos Airport.

Then once you're at the airport, parallel park your car next to the fence.

Get out of your car then get on top of the car and climb the fence. You can pick 2 planes to fly in this airport, the Shamal or the Dodo.

Getting a Helicopter

Again, get a car from your garage or hijack another person's car, then ride to the Los Santos Airport, parallel park it.

Then climb the fence again, then get your plane.

Then fly to San Fierro. You'll get a 6 star wanted level if you haven't unlocked San Fierro yet, so that makes the quest even harder. If you have unlocked all cities, then you're all set.

Now, go to the San Fierro Airport. You have at least 3, 4, or 5 helicopters in the airport. The Leviathan, Raindance, Maverick and other helicopters.