After World War II long runways were available, and North American and European carriers such as Pan Am, TWA, Trans Canada Airlines (TCA), BOAC, and Air France acquired larger piston airliners that could cross the North Atlantic with stops (usually in Gander, Newfoundland and/or Shannon, Ireland). In January 1946 Pan Am's Douglas DC-4 was scheduled New York (La Guardia) to London (Hurn) in 17 hours 40 minutes, five days a week; in June 1946 Lockheed L-049 Constellations had brought the eastward time to London Heathrow down to 15 hr 15 min.
