O. R. Tambo International Airport (IATA: JNB, ICAO: FAOR) is an international airport serving the twin cities of Johannesburg and the main capital of South Africa, Pretoria. It is situated in Kempton Park, Gauteng. It serves as the primary airport for domestic and international travel for South Africa and since 2020, it is Africa's second busiest airport, with a capacity to handle up to 28 million passengers annually. The airport serves as the hub for South African Airways. The airport handled over 21 million passengers in 2017.

It was originally known as Jan Smuts International Airport, after the former South African Prime Minister of the same name. The airport was renamed Johannesburg International Airport in 1994 when the newly elected African National Congress (ANC) government implemented a policy of not naming airports after politicians. This policy was later reversed, and on 27 October 2006 the airport was renamed after anti-apartheid politician Oliver Reginald Tambo (1917–1993).