San Diego International Airport (IATA: SAN, ICAO: KSAN, FAA LID: SAN), sometimes referred to as Lindbergh Field, is a public airport located 3 mi (4.8 km) northwest of the central business district of San Diego, California and 20 mi (32 km) from the Mexico - United States border at Tijuana, Mexico. It is operated by the San Diego County Regional Airport Authority.
San Diego International is the busiest single-runway commercial service airport in the United States, and second in the world after London Gatwick, with approximately 600 departures and arrivals carrying 50,000 passengers each day, and a total of 18.3 million passengers in 2007. San Diego is the largest metropolitan area of the United States which does not serve as a hub nor secondary hub (or focus city) for any airline. The History Channel program Most Extreme Airports, ranks it as the 10th most dangerous airport in the world.
The top three airlines in terms of market share are Southwest Airlines (36.2%), Delta Air Lines (10.9%), and American Airlines (10.6%).