Boeing Boosted The 777-9's Range By 715 Nautical Miles - What That Reveals About Aircraft Performance Numbers

Boeing has quietly raised the advertised range of its upcoming 777-9 from 7,285 nautical miles to as much as 8,000 nautical miles on its website, without any accompanying explanation or change to the aircraft’s capabilities. The update came in June 2026 and also increased the 777-8 figure to up to 9,500 nautical miles (from prior marketing figures), while the 777-9 climbs 9.8% and the 777-8 8.6%. The article notes advertised range depends heavily on assumptions such as payload, configuration, cruise conditions, and fuel reserves. It contrasts this with Airbus’s stated A350 ranges and cites Qantas’ Perth-London 787-9 experience to illustrate “advertized” numbers can mislead.