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San Diego International Airport (IATA: SAN, ICAO: KSAN, FAA LID: SAN), formerly known as Lindbergh Field, is an international airport three miles (4.8 km; 2.6 nmi) northwest of Downtown San Diego, California, United States. It is owned and operated by the San Diego County Regional Airport Authority. The airport covers 663 acres (268 ha) of land and is ranked the third busiest airport in California in terms of passenger traffic.
San Diego International Airport is the busiest single-runway airport in the world. The airport's landing approach is well known for its close proximity to the skyscrapers of Downtown San Diego, and can sometimes prove difficult to pilots for the relatively short usable landing area, steep descent angle over the crest of Bankers Hill, and shifting wind currents just before landing. San Diego International operates in controlled airspace served by the Southern California TRACON, which is some of the busiest airspace in the world.