In 2019, the busiest domestic route at Adolfo Surez, MadridBarajas International Airport, an international airport serving Madrid in Spain, is Catalonia Barcelona (served with three carriers), while the least busy domestic route is AsturiasOviedo,  (served with two carriers).
Adolfo Suarez MadridBarajas Airport (Spanish: Aeropuerto Adolfo Suarez Madrid-Barajas [aeopweto aolfo swae mai aaxas) (IATA: MAD, ICAO: LEMD), commonly known as MadridBarajas Airport, is the main international airport serving Madrid in Spain. Busiest domestic routes at Adolfo Suarez, MadridBarajas International Airport (2019) Catalonia Barcelona 1 Air Europa, Iberia, Vueling Oviedo 10 Air Europa, Iberia 
