 During World War II , the civil aviation planning was conducted by the Aviation Council . In 1945 , they started a limited number of flights that were operated by the Royal Norwegian Air Force . On 2 July 1946 , the Norwegian Ministry of Transport and Communications , several large shipping companies and other private investors reestablished <unk> Norske <unk> ( DNL ) , with the state owning 20 % and the shipping companies 49 % . This airline was granted a 20 @-@ year monopoly on domestic and international flights . According to the concession , only routes that DNL were not willing to fly themselves , could be granted to other airlines . 
