Madrid–Cuatro Vientos Airport (ICAO: LECU), also known as Cuatro Vientos Airport, is the oldest airport in Spain, established in 1911 (1911) and one of the three civil airports of Madrid along with Madrid–Barajas and Madrid–Torrejón Airport. The airport is located 8 km (5.0 mi) southwest of the city centre. The name "Cuatro Vientos" [ˈkwatɾo ˈβjentos] translates into English as "Four Winds".

Cuatro Vientos was originally an air base, which later became also a civil airport. Thus, there is a military section located on a separate apron of the airport, opposite to the civil one. It is also used as the Madrid base for aircraft of the Spanish Police, as well as for the road traffic surveillance helicopters.