Four Corners Regional Airport (IATA: FMN, ICAO: KFMN, FAA LID: FMN) is in San Juan County, New Mexico, United States, in the city of Farmington, which owns it. It is a Class D towered general aviation airport with no commercial passenger services, but has chartered flight services, flight instruction, and a full service fixed base operator (FBO). It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2019–2023, in which it is categorized as a regional general aviation facility.

The airport has free long-term passenger vehicle parking, a full service restaurant and one major car rental company at the terminal, and free WiFi in the terminal area.

Four Corners Regional Airport was served by many commercial air service providers, and was as high as the second busiest in the state of New Mexico, behind the Albuquerque International Sunport. Today it is typically the fourth or fifth busiest airport in the state, usually behind Albuquerque International Sunport, Double Eagle II Airport (also in Albuquerque), Santa Fe Municipal Airport, Roswell International Air Center, and Lea County Regional Airport serving Hobbs. The decline in air service occurred when most regional airlines converted to jet aircraft, and the airport could not adequately adapt to accommodate them: the runways sit on top of a plateau which limited the lengths of the runways. In recent years, construction has been underway to extend the plateau, widen and extend runways, and improve taxiways in an effort to eventually accommodate jet aircraft in accordance with FAA requirements.

Most commercial air service for the area now occurs at the La Plata County Airport near Durango, Colorado.