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.

The airport was originally known as Jan Smuts International Airport, after the former South African Prime Minister. It was renamed Johannesburg International Airport in 1994, and subsequently on 27 October 2006 the airport was renamed after anti-apartheid politician Oliver Tambo.