The Heyday of Propeller Airliners (1941-1958)
Air transportation changed dramatically during and after World War II. New technology led to advanced piston-engine aircraft and new solutions to the problems of navigation and air traffic control.
Regulated by the federal government, a few large airlines continued to dominate. Air traffic grew steadily, as declines in travel time and fares made air travel available to an increasing number of people, and the flying experience continued to improve.
In 1955, for the first time, more people in the United States traveled by air than by train. By 1957 airliners had replaced ocean liners as the preferred means of crossing the Atlantic.