Air Nostrum, legally incorporated as Air Nostrum Líneas Aéreas del Mediterráneo, S.A., is a Spanish regional airline based in Valencia. It currently operates as a franchisee of Iberia as Iberia Regional and an affiliate member of the Oneworld airline alliance. Air Nostrum operates 91 domestic and international routes to 51 destinations, and charter flights. Its main base is Valencia Airport, with hubs at Barcelona Airport and Madrid-Barajas Airport.Limited operations are also carried out on behalf of Brussels Airlines, replacing related wet-lease specialist airline CityJet, having begun in late 2018.