The Douglas DC-8 was United Air Lines’ first jet, entering service on on September 18th, 1959. It DC-8 flew San Francisco and New York Idlewild.
United was the launch customer for the DC-8. The first unit that arrived with the airline on June 3rd, 1959 was registration N8004U, and was given the nickname of Mainliner Capt R T Freng.
Over the next three months, five more units joined United for training purposes. However,UAL took its time to deploy the plane for passenger trips. Despite being the first to receive the aircraft, it entered it into service on the same day as Delta.