Heathrow Terminals 1, 2, And 3 Station
- Wellington Road, TW6 1JH
Zone 6 Tube station on the Piccadilly Line. All Piccadilly Line services call at this station.
Actually inside Heathrow Airport. Close to the Heathrow Central Bus Station, and the Heathrow Connect and Heathrow Express services also call here. According to Wikipedia, passengers transferring between Terminals 1/2/3 and Terminal 4 can use the Heathrow Connect service free of charge, and those transferring between Terminals 1/2/3 and Terminal 5 can use the Heathrow Express service free of charge.