The title of largest 777 operator has changed hands during the aircraft's history. Singapore Airlines' order for up to 77 aircraft on November 15, 1995 constituted the largest-ever wide-body aircraft purchase at the time.[1] The purchase comprised 34 firm orders and 43 options for the 777-200ER, all to be powered by Trent 800 series engines, and was valued at US$12.7 billion.[1] The number of 777 customers had grown to 25 airlines by June 1997, with 323 aircraft on order.[2] On August 26, 2004, Singapore Airlines followed up with a US$4 billion order for the 777-300ER, including 18 firm orders and 13 options.[3] The combined orders would make the carrier's 777 fleet number 77 when deliveries were complete.[3]
On November 20, 2005, Emirates placed the largest firm order for the 777.[4] Totaling 42 aircraft, including 24 −300ERs, 10 −200LRs and 8 777Fs, the purchase was reportedly worth US$9.7 billion.[4] The Middle Eastern carrier followed up with another order for 30 −300ERs at the 2010 Farnborough Airshow.[5]
On September 19, 2013, Lufthansa confirmed a firm order of 20 777-9Xs prior to an official launch of the aircraft.[6] Boeing launched the 777X at the 2013 Dubai Air Show.[7] In March 2014, ANA of Japan ordered 20 777-9X models.