The Boeing 707 is an American, long-range, narrow-body airliner, the first jetliner developed and produced by Boeing Commercial Airplanes. Developed from the Boeing 367-80 prototype first flown in 1954, the initial 707 first flew on December 20, 1957. Developed from: Boeing 367-80 Developed into: Boeing E-3 Sentry; Boeing E-6 Mercury; Northrop Grumman E-8 Joint STARS First flight: December 20, 1957 (65 years ago) Introduction: October 26, 1958 (64 years ago), with Pan American. Outgoing Plane.