Tom it the long run it will use less fuel geezes It don’t have to divert to refuel So no extra take off and land With only two engines (fuel efficient engines) it will use less fuel point to point no stopping !!!!!
Twin engine Remember The A350 XWB's current ETOPS certification covers 99.7% of the Earth's entire surface, allowing point-to-point travel anywhere in the world except directly over the South Pole.[citation needed]