U.S. airmail postal cards appeared several years after airmail service began. The first such card, featuring an eagle in flight, was a 4 cent card sold on January 10, 1949. in the following decades, U.S. airmail postal cards featured themes including the Olympics, airplanes and variations of eagle designs.
Here are some examples of U.S. airmail postal cards.
Air post postal card issued on August 4, 1967.
Air post postal card issued on February 22, 2001.
First day stamped air post postal card issued on June 29, 1972.
First day stamped air post postal card issued on June 29, 1972.