London Stansted Airport (IATA: STN, ICAO: EGSS) is the tertiary international airport serving London, the capital of England and the United Kingdom. It is located near Stansted Mountfitchet, Essex, 42 mi (68 km) northeast of Central London.

London Stansted serves over 160 destinations across Europe, Asia and Africa. Stansted is a base for a number of European low-cost carriers. This includes being the largest base for low-cost airline Ryanair, with over 100 destinations served by the airline. As of 2022, it is the fourth-busiest airport in the United Kingdom after Heathrow, Gatwick, and Manchester. During the COVID-19 pandemic in 2021, it ranked second in the country. Stansted's runway is also used by private companies such as the Harrods Aviation, Titan Airways, and XJet terminals, which are private ground handlers that are able to handle private flights, charter flights, and state visits.

Converted to civil use from RAF Stansted Mountfitchet in the late 1940s, Stansted was used by charter airlines. It came under British Airports Authority control in 1966.