First Commercial Jet Passenger Flight
BOAC flew the first commercial jet passenger service between London and Johannesburg
May 02, 1952
The Jet Age Begins
On May 2, 1952, the de Havilland Comet became the world's first commercial jet airliner to enter passenger service, operating a route from London to Johannesburg for British Overseas Airways Corporation. The Comet was a remarkable achievement — sleek, fast, and capable of flying at high altitude above most weather. The jet engines that powered it were far smoother and quieter than the piston engines of propeller aircraft. Passengers were amazed by the ride quality and by the reduced travel time. The Comet flew at about 500 miles per hour, roughly twice as fast as the propeller airliners it replaced.
Tragedy and Investigation
The Comet's success was short-lived. Between 1953 and 1954, three Comets broke apart in mid-flight, killing all aboard. The crashes were mysterious and deeply alarming. Britain grounded the Comet fleet and launched one of the most thorough accident investigations in aviation history. Investigators discovered that the repeated pressurization and depressurization of the cabin during each flight caused metal fatigue to develop around the square windows. Eventually the fuselage cracked and the aircraft disintegrated at altitude. The investigation transformed aviation safety and materials science permanently.
The Lessons That Saved Lives
The Comet disasters led to fundamental changes in aircraft design, including oval windows that distributed stress more evenly — a feature found on every commercial jet today. By the time a redesigned Comet returned to service, American manufacturers including Boeing had learned from Britain's mistakes and launched the Boeing 707, which dominated the new jet age. Though the Comet's story is one of tragedy, the lessons extracted from its failures made air travel dramatically safer. Use the date calculator to see how much commercial aviation has expanded since 1952.