This weekend marks the 40 years since Her Majesty the Queen opened the first London Underground Tube link to the airport via the Heathrow Central Station.
On December 16, 1977, Queen Elizabeth II was on hand to officially open the extension of the Piccadilly Line to Heathrow following a £71m, 2-year, project.
At the time, the connection between the centre of the capital city, London, and the airport was the first of its kind in the world.
Today over 17.7 million journeys are made to and from the airport via the Piccadilly Line.
Late last year, in 2016, the connection was boosted further by the arrival of Night Tube services – serving the airport 24-hours a day on Friday and Saturday nights.
Next year the airport will also begin welcoming the initial phase of connections to The Elizabeth Line (Crossrail) with increased services to follow in 2019.