The Boeing 777 is a long-range wide-body twin-engine jet airliner designed and manufactured by Boeing Commercial Airplanes, the commercial business unit of Boeing. Commonly referred to as "Triple Seven", it is the largest twinjet and the world's longest-range airliner. The 777 can accommodate between 301 and 365 passengers in a three-class layout, and has a range of 5,235 to 9,380 nautical miles (9,695 to 17,372 km), depending on the model. Developed in consultation with eight major airlines, the 777 was designed to replace older wide-body airliners and bridge the capacity difference between the 767 and 747.
The 777 is produced in two fuselage lengths. The original 777-200 model first entered service in 1995, followed by the extended-range 777-200ER in 1997; the stretched 777-300, which is 33.3 ft (10.1 m) longer, began service in 1998. The longer-range 777-300ER and 777-200LR variants entered service in 2004 and 2006, respectively, while a freighter version, the 777F, debuted in 2009.
United Airlines first placed the 777 into commercial airline service in 1995. The most successful variant is the 777-300ER with 432 aircraft delivered and over 700 orders to date.Emirates operates the largest 777 fleet, with 87 aircraft.FedEx Express operates the largest fleet of the 777F cargo aircraft. As of August 2013, 1,467 Boeing 777s, of all variants, have been ordered, and 1223 have been delivered.
United Airlines placed the launch order for the 777 program on October 14, 1990 when it purchased 34 Pratt & Whitney PW4084-powered 777-200s valued at US$11 billion with options on an additional 34. Subsequent versions of the 777, including the 777-200ER, 777-200LR, 777-300, 777-300ER, and 777F, have been launched by Air France, British Airways, Cathay Pacific, and Pakistan International Airlines (PIA). The following table lists milestone dates for each model of the aircraft.