The 1945 Japan–Washington flight was a record-breaking air voyage made by three specially modified Boeing B-29 Superfortresses on September 18–19, 1945, from the northern Japanese island of Hokkaidō to Chicago in the Midwestern United States, continuing to Washington, D.C. The flight was made by three United States Army Air Forces (USAAF) generals and other airmen returning to the United States from their overseas duty after World War II. At that date, it involved the heaviest load carried by an American aircraft (144,000 lb, 65,300 kg), the longest nonstop flight made by the USAAF (5,840 mi, 9,400 km), and the first nonstop flight from Japan to the United States. However the flight did not break the then-world distance record established by the Royal Air Force in 1938.