The race for dominance in ultra-long-haul flying has entered a new era with the development of next-generation widebody airliners that can connect the farthest points on the globe without stopping. At the center of this evolution are a pair of flagship twinjets produced by Boeing and Airbus, the industry’s two foremost engineering powerhouses. The Boeing 777X and the Airbus A350-1000ULR are both models that offer impressive capabilities.