Wikipedia
Nordsjøfly A/S was an airline which operated from 1977 to 1983 out of Haugesund Airport, Karmøy. Based in Avaldsnes in Karmøy, Norway, the airline used a mix of aircraft to operate scheduled and charter flights. It was started at the time of Haugesund Airport opening and commenced a taxi route service to Bergen and Stavanger, at first using the Piper PA-31 Chieftain and a Beechcraft 99 Queenliner.
A service from Stavanger via Farsund to Kristiansand was introduced in 1980. Larger Britten-Norman Islander and Fairchild Swearingen Metroliner were used for charter flights, the latter also used on scheduled services from 1981. Norving bought the airline that year. Nordsjøfly never made a profit and was liquidated in 1983. Norving continued to carry on the scheduled services itself until 1987.