Boeing 707 ushering in the Jet Age. It established Boeing as one of the largest manufacturers of passenger aircraft, and led to the later series of airliners with "7x7" designations. The later 720, 727, 737, and 757 share elements of the 707's fuselage design. The 707 was developed from the Boeing 367-80, a prototype jet first flown in 1954. A larger fuselage cross-section and other modifications resulted in the initial-production 707-120, powered by Pratt & Whitney JT3C turbojet engines, which first flew on December 20, 1957. Pan American World Airways began regular 707 service on October 26, 1958. Later derivatives included the
Transair (Canada) scheduled service on Canadian routes followed by the intercontinental version of the Boeing 707 a year later. The Boeing 707-320C was used strictly for charter flights, primarily to international destinations. By 1976 the scheduled route network extended throughout Canada from Toronto in the east to Whitehorse in the west with charter flights being operated to Europe, Mexico, the Caribbean, Hawaii, Florida and other destinations in the U.S. According to the February 1976 edition of the North American Official Airline Guide (OAG), Transair was operating daily scheduled service with either Boeing 737 or Fokker F28 aircraft direct between Toronto (YYZ) and