Louisville International Airport is a public and military use public airport centrally located in the city of Louisville in Jefferson County, Kentucky, USA. The airport covers 1,200 acres (4.9 km²) and has three runways. Its IATA airport code, SDF, is based on the airport’s former name, Standiford Field. The airport is the tenth busiest in the world by cargo traffic. Despite its name, all its destinations are in the United States, with the exception of cargo flights.