1963 Event 1st round-trip swim of Strait of Messina, Italy (Mary Revell of U.S.) 1955 Event 1st transcontinental round-trip solo flight-sunrise to sunset 1946 Event 1st transcontinental round-trip flight in 1-day, California-Maryland 1936 Event 1st transatlantic round-trip air flight 1910 Event Pilot Charles Hamilton makes 1st 1-day round-trip from New York to Philadelphia
