Heathrow Airport is located in which London borough?

Heathrow Airport (also known as London Heathrow) is a major international airport in London, United Kingdom. Heathrow is the second busiest airport in the world by international passenger traffic, as well as the busiest airport in Europe by passenger traffic, and the sixth busiest airport in the world by total passenger traffic. It is one of six international airports serving Greater London. In 2017, it handled a record 78.0 million passengers, a 3.1% increase from 2016.

Heathrow is 14 mi (23 km) west of central London, near the south end of the London Borough of Hillingdon on a parcel of land that is designated part of the Metropolitan Green Belt. The airport is surrounded by the villages of Harlington, Harmondsworth, Longford and Cranford to the north and by Hounslow and Hatton to the east. To the south lie Bedfont and Stanwell while to the west Heathrow is separated from Slough in Berkshire by the M25 motorway. Heathrow falls entirely under the Twickenham postcode area, with the postcode TW6.

In September 2012, the UK government established the Airports Commission, an independent commission chaired by Sir Howard Davies to examine various options for increasing capacity at UK airports. In July 2015, the commission backed a third runway at Heathrow, which the government approved in October 2016.