McClellan–Palomar Airport (Palomar Airport) is a public airport three miles (5 km) southeast of Carlsbad in San Diego County, California. It is owned by the County of San Diego. The airport is used for general aviation. In March 2013 the airport was the fourth-busiest single runway airport in the United States. Most U.S. airports use the same three-letter location identifier for the FAA and IATA, but McClellan–Palomar Airport is CRQ to the FAA and CLD to the IATA. The ICAO identifier is KCRQ.