#Onthisday in 1918, DDL (Det Danske Luftfartselskab A/S), or Danish Air Lines, was founded. The airline merged with other Scandinavian airlines to form #SAS (Scandinavian Airlines System) in 1951. SAS is the flag carrier for Norway, Denmark, & Sweden. Have you ever flown on SAS? This tweet was posted on October 29, 2021.