Legally incorporated as Air Nostrum, Líneas Aéreas del Mediterráneo, S.A., the airline operates as a franchisee of Spanish national flag carrier Iberia and is an affiliate of the one world airline alliance. From its main base at Valencia Airport (VLC) and hubs at Barcelona Airport (BCN) and Madrid-Barajas Airport (MAD), Air Nostrum operates 91 routes to 51 destinations.