Doolittle's Atlantic-to-Pacific Flight The first transcontinental flight across the United States within a single day (24-hour period) was made by Lt. Jimmy Doolittle on Sept. 4, 1922. Flying a DH-4B, Lt. Doolittle took off from Pablo Beach, Fla., and landed at Rockwell Field near San Diego, Calif., covering a distance of 2,163 miles in 21 hours, 20 minutes flying time. He made one refueling stop at Kelly Field near San Antonio, Texas. Click here to return to the Endurance Flights Overview. Find Out More Related Fact Sheets De Havilland DH-4 Note: The appearance of hyperlinks does not constitute endorsement by the National Museum of the USAF, the U.S. Air Force, or the Department of Defense, of the external website, or the information, products or services contained therein.