 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 Det Norske Luftfartselskap ( 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 . 
 During World War II , the civil aviation planning was conducted by the Aviation Council . In 1945 , they started a limited number of flights <a href='null_relcl' title='1'><mark>that</mark></a><a href='uninflect' title='2'><mark>were</mark></a> 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 Det Norske Luftfartselskap ( 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 <a href='negative_concord' title='3'><mark>were</mark></a> <a href='negative_concord' title='4'><mark>not</mark></a>willing to fly themselves , could be granted to other airlines . 
Durin World War II , the civil aviation plannin was conducted by da Aviation Council . In 1945 , they started a limited number of flights was operated by tdaRoyal Norwegian Air Force . On 2 July 1946 , the Norwegian Ministry of Transport and Communications , several large shipping companies and other private investors reestablished Det Norske Luftfartselskap ( DNL ) , witt the state owning 20 % and thdahipping companies 49 % . dis airline was granted a 20 @-@ year monopoly on domestic and international flights . According to the concession , only routes dat DNL ain't willin to fly themselves , could be granted to other airlines .