At 6:52 p.m. on November 1, 1955 United Air Lines Flight 629, a DC-6B with forty-four persons aboard, took off from Stapleton Airport, Denver, Colorado, bound for Portland, Oregon. Eleven minutes later, the thirty-nine passengers, including an infant and five crew members, were dead -- killed instantly when the luxurious airliner crashed on a sugar beet farm near Longmont, Colorado.
The four-engine prop DC-6B revved up its mighty turbines at the end of the runway with a tremendous roar. As the pilot released the wheel brakes, United Airlines flight 629 rolled down the narrow, bumpy tarmac gathering speed. The front wheel gently lifted from the ground as the nose of the aircraft pointed toward the heavens. Within moments, the sturdy airplane soared into the crystal blue sky and banked gracefully to the west, on its way to a 1,029-mile journey to Portland, Oregon. On board, Captain Lee Hall, an accomplished pilot and veteran of World War II, pulled steadily back on the control arm and within minutes, leveled off the plane at 4,000 feet. Visibility was good, and the crew, consisting of pilot, a co-pilot and three stewardesses, prepared for a leisurely flight over Colorado, Wyoming and Idaho.
United Airlines Flight 629, registration N37559, was a Douglas DC-6B aircraft, named "Mainliner Denver," which was blown up with a dynamite bomb placed in the checked luggage. The explosion occurred over Longmont, Colorado while the airplane was en route from Denver, Colorado to Portland, Oregon, and Seattle, Washington, on November 1, 1955. All 39 passengers and five crew members on board were killed in the explosion and crash.
United Airlines Flight 629 was a flight that flew from Stapleton Airport in Denver, Colorado to Portland, Oregon. This flight was bombed on November 1, 1955, killing all 44 people on board.
The captain on the flight on that day, Lee Hall, was a World War II veteran.
The aircraft used was N37559, a Douglas DC-6B. The flight took off at 6:29 p.m. Denver time. Several sticks of dynamite planted on the aircraft exploded nine minutes later, at 6:38 p.m., while the flight was over Longmont, Colorado. The debris was scattered across several square miles of Weld County, Colorado.
A man named Jack Gilbert Graham had planted this bomb to collect his mother's insurance money. The death penalty was administered on him a year later.