In post-World War I, as the aviation industry grew, several commercial airlines began operations delivering U.S.
In post-World War I, as the aviation industry grew, several commercial airlines began operations delivering U.S. Airmail, and then carrying passengers. In the 1920s and 1930s, the period between the two World Wars became known as the Golden Age of Flight. Many of the most notable early airlines were founded during this time period; Western Air Express and Ford Air Transport Service in 1925; Pan American Airways in 1927, which flew airmail from Key West to Havana, and Transcontinental & Western Airlines in 1930 (later TWA), when Western Air Express merged with Transcontinental Air Transport.