The Boeing 747 is celebrating its 55th anniversary since its first revenue-generating flight (with Pan Am). It’s been five years since Simple Flying looked back on the Jumbo’s then-50-year long history. On 30 September 1968, the first 747 rolled out of its Everett Plant in Washington State. The Boeing 747 first flew on 9 February 1969, and it entered service on 22 January 1970. Now 55 years later, as the sun continues to set on the Jumbo, only three airlines around the world operate scheduled passenger flights with the 747 (more operate cargo variants). While the Boeing 747 is seen as a crowning achievement of American aviation engineering, no US-based airlines operate it as a commercial scheduled passenger aircraft anymore.