Here You can find a list of airlines which operated in Harstad/Narvik airport.
Andøya - Widerøe
Bergen - Widerøe
Bodø - Widerøe, Scandinavian Airlines System
Oslo Gardermoen - Norwegian AirShuttle, Scandinavian Airlines System, Servicios de Transportes A
Tromsø-Langnes - Widerøe, Norwegian AirShuttle
Trondheim Vaernes - Widerøe