It was used by Handley Page Transport, an early British airline established in 1919. Source: wikipediaDELAG, Deutsche Luftschiffahrts-Aktiengesellschaft was the world's first airline. It was founded on November 16, 1909 and operated airships manufactured by The Zeppelin Corporation. Image credits: wikipediaIn 1924, Imperial Airways was formed. It opened up, for the first time, air routes across the world. Image credits: wikipediaThe DC-3 is often regarded as one of the most influential aircraft in the history of commercial aviation and revolutionized the aviation industry. Source: WikipediaIn October 1945 the American Export Airlines became the first airline to offer regular commercial flights between North America and Europe. Source: wikipediaThe first Asian airline was Philippines Airlines. Image credits: wikipedia