KATMANDU, Nepal—The grandson of one of the first men to fly over Mount Everest says he marked the 80th anniversary of the pioneering flight by flying to the world's highest mountain.

Charles Douglas Hamilton said he flew as a passenger in a modern plane to the Everest region on Wednesday. His grandfather, Douglas Douglas-Hamilton, and three other men flew over Everest on April 3, 1933, in two open-cockpit planes, wearing heated suits and battling harsh weather conditions as they crossed over the 8,850-meter (29,035-foot) peak.

Charles Douglas Hamilton, who is not a pilot, said he did not fly over Everest like his grandfather, but he was able to see the mountain from the plane, which got about 13 kilometers (8 miles) from Everest, flying at around 7,163 meters (23,500 feet).