In 2019, the busiest domestic route at Adolfo Surez MadridBarajas Airport is the Galicia_(Spain)Santiago de Compostela, which is served with five carriers, while the least busy route is Galicia_(Spain)Vigo, and is only served with one carrier.
Busiest domestic routes at Adolfo Suarez, MadridBarajas International Airport (2019) Santiago de Compostela 7 Air Europa, Iberia Express, Ryanair 
