Claim: According to the 2019 study, the most active route at Adolfo Suárez, Madrid–Barajas International Airport, (an airport that serves Madrid in Spain) is the Catalonia Barcelona which has three carriers serving in the location, while the least busy domestic route is AsturiasOviedo and has two carriers serving in the location.
Evidence: Adolfo Suárez Madrid–Barajas Airport (Spanish: Aeropuerto Adolfo Suárez Madrid-Barajas [aeɾoˈpweɾto aˈðolfo ˈswaɾeθ maˈðɾið βaˈɾaxas) (IATA: MAD, ICAO: LEMD), commonly known as Madrid–Barajas Airport, is the main international airport serving Madrid in Spain. Busiest domestic routes at Adolfo Suárez, Madrid–Barajas International Airport (2019) Catalonia Barcelona Air Europa, Iberia, Vueling 1 10 AsturiasOviedo Air Europa, Iberia 2,573,822 Busiest European routes at Madrid–Barajas International Airport (2019) PortugalLisbon, Portugal 1,557,731 548,114 Busiest intercontinental routes at Madrid–Barajas International Airport (2019) 1,030,397 1