This is a list of airlines by foundation date, founded before December 31, 1930.
The date of the first airline service may differ from the foundation date. Bold names indicate that the airline is still in operation.
|DELAG||November 16, 1909||March 21, 1935||The world's first airline in revenue service. Operated Zeppelin airships. Merged with Deutsche Zeppelin Reederei (DZR) in 1935, which continued transatlantic flights until the Hindenburg disaster in 1937. Company dissolved in 1940.|
|Aero Rt.||December 22, 1910||1920||Merged with Magyar Aeroforgalmi Rt (MAEFORT)|
|St. Petersburg-Tampa Airboat Line||1913||May 5, 1914||First winged airline. See Thomas Reilly, Jannus: An American Flyer|
|Aircraft Transport and Travel||October 5, 1916||1921||Services started 25 August 1919; first scheduled daily international commercial air service, London to Paris. A subsidiary of Airco, its assets were used to create Daimler Airway. Despite numerous takeovers and mergers, British Airways can trace part of its legacy back to Aircraft Transport and Travel.|
|Chalk's Ocean Airways||1917||2007||Started scheduled service between Florida and the Bahamas in February 1919; Became Chalk's International Airlines.|
|Deutsche Luft-Reederei||December 1917||1923||Services started February 5, 1919. Became part of Deutscher Aero Lloyd in 1923, merged into Deutsche Luft Hansa in 1926. Founding member of International Air Traffic Association in 1919.|
|Det Norske Luftfartsrederi||1918||1921||Founding member of IATA|
|Det Danske Luftfartselskab||October 29, 1918||1951||Services started August 7, 1920. Part of SAS since 1946.|
|Category: Airlines by year of establishment