The Airtrain is a model of a Boeing 727. In Grand Theft Auto III and Vice City the plane isn't solid, except the ones parked at the airport. The Airtrain can be spawned with modifications but may crash the game. The Airtrains flight path is determined by the flight1.dat file on the game. In GTA Liberty City Stories, the plane isn't solid. Simply touching the plane while in a vehicle will kill the player and destroy their vehicle. In GTA Vice City Stories, the plane is solid but the player will lose health instead of being wasted instantly if they touch the plane.
- In GTA Vice City Stories, the plane can be entered by the player but can't be controlled. The only thing that the player can control on the plane is the radio stations.