This summer, you can fly to:
Nationally: Oviedo, Bilbao, Santander, Santiago de Compostela, Zaragoza, Barcelona, Madrid, Melilla, Palma de Mallorca & Seville;
Internationally: Niederrhein, Ámsterdam, Birmingham, Londres, Manchester, Luxemburgo, Nottingham, Estocolmo, Bruselas, Bratislava, Kosice, Praga, Brno, Reikiavik & Varsovia
According to AENA, the airports operator.
However, many of the international flights are charter only, operated by travel agents. The only international regular scheduled flights are to Niederrhein, Bruselas, Birmingham, Londres, Manchester & Nottingham.