DELAG, acronym for Deutsche Luftschiffahrts-Aktiengesellschaft (German for "German Airship Travel Corporation"), was the world's first airline to use an aircraft in revenue service.[1] It was founded on 16 November 1909 and operated Zeppelin rigid airships manufactured by the Luftschiffbau Zeppelin Corporation. Its headquarters were located in Frankfurt, Germany.
https://en.wikipedia.org/wiki/DELAG


...And with intercontinental flight.

LZ 127 Graf Zeppelin (Deutsches Luftschiff Zeppelin #127; Registration: D-LZ 127) was a German-built and -operated, passenger-carrying, hydrogen-filled, rigid airship which operated commercially from 1928 to 1937. When it entered commercial service in 1928, it became the first commercial passenger transatlantic flight service in the world. It was named after the German pioneer of airships, Ferdinand von Zeppelin, who was a count (Graf) in the German nobility.

https://en.wikipedia.org/wiki/LZ_127...airship_flight

https://www.youtube.com/watch?v=tSKkAteMk2A