In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.

Early pilots depended on visual landmarks, preventing reliable nighttime navigation. When the postal service took to the skies with transcontinental mail delivery, a lighted pathway was formed to guide pilots at night. Throughout the 1920s, a series of powerful light beacons was built, eventually stretching from New York to San Francisco. This Wyoming beacon is the mid-point of the route.

Transcontinental air mail pilots relied on a string of powerful light beacons to navigate sections of the New York to San Francisco route at night. They flew night mail planes equipped with illuminated instrument panels, navigation lights, and landing lights. At airfields along the way, floodlights helped workers inspect the planes, refuel, and unload and load the mail.

In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.

Early pilots depended on visual landmarks, preventing reliable nighttime navigation. When the postal service took to the skies with transcontinental mail delivery, a lighted pathway was formed to guide pilots at night. Throughout the 1920s, a series of powerful light beacons was built, eventually stretching from New York to San Francisco. This image celebrates Cleveland's first night mail flight.

In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.

In 1924, with the success of experimental night operations and increasing business interest in next-day mail, the U.S. Air Mail Service announced plans to establish regular overnight flights between New York and Chicago. Preparations included mounting floodlights and searchlights at airfields and constructing a series of routing beacons and emergency landing fields along the route. The first official flights departed from both terminal cities on July 1, 1925.

Federally subsidized air mail service encouraged commercial aviation. Pilots first navigated by visible landmarks, flying only in daylight. Lighted beacons, installed along flight paths, enabled night flights. It was dangerous work. Air mail pilot Charles Ames died when his plane crashed in central Pennsylvania, on the route from New York to Chicago, in 1925.