B-14 Flying Boat; Wikimedia Commons
The Pacific Clipper, a Boeing 314 flying boat, was preparing to land in New Zealand when Japan attacked Pearl Harbor. They backtracked to New Caledonia, then Australia. From there, they flew on to the Dutch East Indies, Ceylon, Pakistan, Sudan, Belgian Congo, Brazil and Trinidad, finally reaching New York City in the first around-the-world flight by a commercial airliner .
Total distance = 50,694 KM. Total flight time = 209 hours.
After this flight, the Pacific Clipper was assigned to the U.S. Navy for the rest of World War II.