<Tr> <Th> Passengers </Th> <Td> 3,346,545 </Td> </Tr> <Tr> <Td_colspan="2"> Sources: FAA, RITA / BTS, Airport website </Td> </Tr> <P> Louisville International Airport (IATA: SDF, ICAO: KSDF, FAA LID: SDF) is a public and military use public airport centrally located in the city of Louisville in Jefferson County, Kentucky, United States . The airport is situated on approximately 1,500 acres (6.1 km) and has three runways . Its IATA airport code, SDF, is based on the airport's former name, Standiford Field . Although it currently does not have regularly - scheduled international passenger flights, it is a port of entry, as it handles numerous international cargo flights . </P> <P> Over 3.2 million passengers and over 4.7 billion pounds (2,350,000 t) of cargo pass through the airport each year . It is also the third - busiest in the United States in terms of cargo traffic, and seventh - busiest for such in the world . </P>

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