If you try to fly forward but aren't moving, check your thrusters. They need to be pointed backward for traditional flight.
If you have a high wanted level, the military will send their own Hydras after you. Use the "flares" (secondary fire) to distract incoming missiles. San Andreas Fighter Jet Cheat
It is the fastest vehicle in the game, perfect for crossing the map from Los Santos to Las Venturas in seconds. Pro-Tips for Aspiring Pilots If you try to fly forward but aren't