Flight Simulator 98
(Microsoft)

This cheat enables you to go pretty much wherever you want instantly. Simply press Y+F4 while on the runway and you will rise mysteriously into the air. When you want to stop, press Y again. Now, at any point during the game, press Y again to enter SLEW mode. Now press F2 to go forward/backwards, and F1 to stop. F4 takes you up/down, with F3 to stop. You can also use the arrow keys on your keyboard to move left and right. When you are done, press Y once again to restart the game.