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
Freedoms of the air rights. From its 1962 initiation of Boeing 707 service to Idlewild (renamed JFK in 1964) flights had intermediate stops at one Middle East airport (Kuwait, Cairo, or Beirut), then two or three European airports, the last of which was always London's Heathrow, with trans-Atlantic service operating between Heathrow and JFK. This service continued well into the Boeing 747 era. Currently, Air India's North American flights are nonstop Boeing 777 service to India, with one exception, that being a revival of fifth freedom flights operating Boeing 787 service on the Newark—Heathrow—Ahmedabad route. The fifth freedom has been discussed in 2017 in