The Boeing 787-9 Dreamliner is one of the world's most capable ultra-long-haul aircraft, with an official range of approximately 7,565 nautical miles (14,010 km). Under normal commercial operating conditions in 2026, it can fly for roughly 17 to 18 hours on a single tank of fuel. The current record-holder for the longest scheduled flight using a 787-9 is the Qantas route between Perth and London Heathrow, which consistently stays in the air for just under 18 hours. While the aircraft could technically fly for nearly 24 hours under "ideal" conditions with no payload (cargo/passengers), its practical limit for airline service is dictated by fuel reserves and prevailing winds. For example, a flight from New York to Auckland typically takes about 16-17 hours, pushing the aircraft toward its operational maximum. This high endurance is made possible by its advanced composite fuselage and fuel-efficient GEnx or Trent 1000 engines, which allow for "point-to-point" transpacific and transatlantic travel that was previously impossible for twin-engine jets.