The station opened as Heathrow Central on 16 December 1977 as the final phase of the Piccadilly line's extension from Hounslow West to the airport. The preceding station, Hatton Cross, had opened as the interim terminus in 1975. At its opening, the station served as the terminus of what became known as the Heathrow branch of the line — previously it had been the Hounslow branch. It was the first time that an airport had been directly served by an underground railway system. With the development of the airport's new Terminal 4 underway for which a separate Underground station would be provided, the station was renamed Heathrow Central Terminals 1, 2, 3 on 3 September 1983. The station gained its present name on 12 April 1986, the same day that services began at the Heathrow Terminal 4 station.
Heathrow Terminals 1, 2, 3 has a double crossover directly to the east which can be seen from the platform. The station has six escalators of which two operate from the platform to the ticket hall area and two operate in the opposite direction; the other two connect the ticket hall area to the surface. A mezzanine floor between the platform and ticket hall levels provide staff accommodation and facilities. Trains may serve platform 1 from either direction but platform 2 may only be served by eastbound trains. British Transport Police maintain a presence at Heathrow. Until 2012, free transfer was not possible between terminals, in contrast to the Heathrow Express. In January 2012, free travel was introduced for Oyster card holders between the Heathrow stations on the Piccadilly line. Journeys from Heathrow Terminals 1,2,3 to Terminal 4 via the Piccadilly line require a change at Hatton Cross (this journey is free, despite Hatton Cross not being part of the free travel zone). As of March 2012, the station had undergone renovation works which featured an extended control room, all six escalators refurbished, a station enhancement and two Step Free Access lifts from the ticket hall (located near the bottom of the escalators from street level) to the platforms. Step Free Access to street level will continue to be served by the two airport lifts from the Coach station. The station has payphones, wi-fi, cash machines, Euro cash machines, lifts and escalators.
ATTENTION: Heathrow Terminals 1,2,3 Station: Ticket hall improvements will start to take place from October 2015, when the ticket office in this station closes. Work will last for up to 12 weeks as TfL install additional ticket machines. The ticket office will not reopen when the work is complete. There will be a new Visitor Information Centre in this ticket hall, supporting visitors to London and people who use the Tube less frequently. To pay for travel, you can now: Use your contactless payment card Use the smarter ticket machines or Buy tickets or top up your Oyster card online or at nearby Oyster Ticket Stops.
Connections: The station is served by London Buses routes 105, 111, 140, 285, A10, U3, the express route X26, and the Night Route N9. Non-TfL routes 75, 76, 441, 555, 740, A30, A40, and Green Line Coaches express route 724 all serve the station to destinations outside of Greater London.