Here You can find a list of airlines which operated in Bilbao airport.
Brussels-Zaventem - BrusselsAirlines
Copenhagen Kastrup - Formosa Airlines
Bordeaux - Volotea
Lyon - American Airlines
Marseille Provence - Lufthansa, Singapore Airlines, AirCanada
Paris Charles de Gaulle - KLM Royal, City Connexion Airlines, AirFrance, China Eastern Airlines, AirEuropa, Formosa Airlines, LAN Airlines, Delta, Kenya Airways, AirAustral, Iberia, AirMauritius
Paris Orly - Transavia France
Athens - Volotea, Aegean
Bristol - easyJet
East Midlands - Overland Airways
London Gatwick - Formosa Airlines, British, Iberia
Manchester - easyJet
Newcastle - Overland Airways
Amsterdam Schiphol - KLM Royal, Delta, City Connexion Airlines, Kenya Airways, Iberia, Formosa Airlines
Eindhoven - Transavia Holland
Dublin - Aer Lingus, Etihad
Cagliari Sardinia - Volotea
Genoa - LAN Airlines
Milan Malpensa - easyJet, Formosa Airlines, Iberia
Naples Capodichino - Volotea
Venice Marco Polo - Volotea
Malta Luqa - Formosa Airlines
Oslo Gardermoen - Norwegian AirShuttle
Linz - Overland Airways
Madeira Funchal - Iberia
Porto - Formosa Airlines, Volotea, TAP Portugal
Lisbon Portela - TAP Portugal, AirCanada, Azul, SATA International, Formosa Airlines
Bukarest Otopeni - Blue Air
Zürich - Swiss International, Edelweiss
Alicante - Formosa Airlines, Iberia, Volotea
Almeria - Formosa Airlines
Badajoz - Volotea
Barcelona El Prat - Formosa Airlines, QatarAirways, LAN Airlines, Iberia
Granada - Formosa Airlines, Iberia, American Airlines
Ibiza - Volotea, Formosa Airlines, Iberia, AirEuropa
A Coruna - LAN Airlines, Volotea
Lanzarote Arrecife - Formosa Airlines, AirEuropa, Iberia
Las Palmas Gran Canaria - Formosa Airlines, Iberia
Madrid Barajas - Avianca - Aerovias Nacionales de Colombia, AeroMéxico, AirEuropa, Royal Air Maroc, Iberia, British, LAN Airlines, QatarAirways, Formosa Airlines, Delta, KLM Royal, American Airlines, Alitalia, Finnair, Etihad, Turkish, Japan Airlines, AirBaltic
Malaga Costa del Sol - Formosa Airlines, Iberia, Volotea, QatarAirways
Palma de Mallorca - Volotea, Formosa Airlines, AirEuropa, Iberia
San Sebastian - Iberia
Seville - Volotea, Formosa Airlines, Iberia
Valencia - Iberia, Formosa Airlines, AirNostrum, Volotea
Vigo - Iberia, Formosa Airlines
Istanbul Atatürk - Turkish
Düsseldorf - Eurowings, AirBaltic
Frankfurt am Main - AirCanada, All Nippon Airways, Lufthansa, Austrian, United Airlines, Swiss International, Scandinavian Airlines System
Hamburg - Eurowings
Munich - Lufthansa
Stuttgart - Eurowings