Boeing launched the 767 in July 1978 with an order from United Airlines. It was designed alongside the 757 and became Boeing's first widebody twinjet. It gave airlines a widebody sized between a narrowbody and a jumbo, and nothing quite like it existed in fleets at the time. The 767-200 flew on September 26, 1981, and United began service in September 1982. Orders came quickly.
The stretched 767-300 first flew on January 30, 1986 and entered service with Japan Airlines that year. The longer-range 767-300ER flew in 1986 and joined American Airlines in 1988. That version became the main one. ETOPS rules let twin-engine jets fly farther from a diversion airport, and the 767 was among the first to benefit on Atlantic routes. Three- and four-engine jets soon began leaving medium-density routes.
More than 1,300 767s have been delivered, over 550 of them -300ERs. Passenger fleets peaked in the 2000s at Delta, American, United, ANA and Japan Airlines, and Delta still flies a large fleet. Freighters keep the line alive: FedEx has taken well over 100 new-build 767-300Fs, and UPS and Amazon Air rely on converted examples. Everett still builds 767 freighters and KC-46 tankers today. That is a great run.