O. R. Tambo International Airport (IATA: JNB, ICAO: FAOR, formerly FAJS) (ORTIA) is a major international airport in Kempton Park, Ekurhuleni, Gauteng, South Africa, near the city of Johannesburg and, to a lesser extent, the executive capital Pretoria. It serves as the primary airport for domestic and international travel to/from South Africa and is Africa's busiest airport with a capacity to handle up to 28 million passengers annually with non-stop flights to all continents except Antarctica. The airport is the hub of South Africa's largest international and domestic carrier, South African Airways (SAA), and a number of smaller local airlines. The airport handled a total of 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 government implemented a policy of not naming airports after politicians. The policy was reversed later, and the airport was renamed again on 27 October 2006 after Oliver Reginald Tambo; a former President of the African National Congress.