South African Airways, the flag carrier of South Africa, and subsidiary South African Express have their head offices in Kempton Park. Airlink, a regional South African airline, has its headquarters on the grounds of OR Tambo Airport. Mango, a low cost airline, is headquartered on the grounds of OR Tambo. The headquarters of Comair and Kulula.com are at an intersection within Ekurhuleni in close proximity to OR Tambo. Federal Air also has its headquarters on the OR Tambo grounds. 1Time had its head office in the Isando Industrial Park. Safair's head office is in Kempton Park.