This United States event cover commemorates the first flight air mail on Route AM 18 POD, dated January 16, 1932. The cachet prominently features a printed blue illustration of Sioux Falls, South Dakota, showcasing the cityscape and the waterfall, with text reading "FIRST FLIGHT AIR MAIL ROUTE AM 18 P.O.D. BROOKINGS, S. DAK." and "SIOUX FALLS SOUTH DAKOTA JANUARY 16 1932." This event cover highlights an important milestone in early U.S. airmail service.

The postage is a 5-cent U.S. Air Mail stamp, depicting a classic biplane in flight, integrated into a blue circular design with the denomination clearly visible. The cover bears a circular postmark from Sioux Falls, South Dakota, dated January 16, 1932, with the time "9 1 AM" displayed. The postmark confirms the date of this first flight event. The addressee is John Bonell Jr., residing at 1206 - 3rd St., Brookings, South Dakota. The envelope is a standard air mail bordered envelope with red and blue edges, typical of the era. This piece is a fascinating collectible for philatelists interested in aviation history, U.S. airmail, and first flight covers.