Los Angeles International Airport (IATA: LAX, ICAO: KLAX, FAA LID: LAX) is the primary international airport serving Los Angeles and its surrounding metropolitan area in California, United States. LAX is located in the Westchester neighborhood of the city of Los Angeles, 18 miles (29 km; 16 nmi) southwest of Downtown Los Angeles, with the commercial and residential areas of Westchester to the north, the city of El Segundo to the south and the city of Inglewood to the east. LAX is the closest airport to the Westside and the South Bay.

The airport is operated by Los Angeles World Airports (LAWA), a branch of the Los Angeles city government, that also operates the Van Nuys Airport for general aviation. The airport covers 3,500 acres (1,400 ha) of land and has four parallel runways.

In 2022, LAX handled 65,924,298 passengers, making it the world's sixth-busiest airport. It was still in the top ten busiest airports in 2023, according to the Airports Council International rankings. As the largest and busiest international airport on the West Coast of the United States, LAX is a major international gateway for the country, serving as a connection point for passengers travelling internationally (such as East and Southeast Asia, Australasia, Mexico and Central America). The airport holds the record for the world's busiest origin and destination airport, because relative to other airports, many more travellers begin or end their trips in Los Angeles than use it as a connection. In 2019, LAWA reported approximately 88 percent of travellers at LAX were origination and destination passengers, and 12 percent were connecting.