https://www.cnet.com/news/boeing-747-history-united-retirement/“Next Tuesday, Nov. 7 marks the last Boeing 747 flight for United Airlines. Once one of the largest operators of the original jumbo jet (the airline took its first 747 in 1970), United has slowly been retiring its 747s over the last few years. Newer and more efficient aircraft including the Boeing 777 will take their place, letting the airline cut fuel costs and no doubt pleasing many of its passengers eager for modern amenities such as seatback TVs in economy.”