United Airlines is moving forward with a significant fleet modernization by adopting next-generation widebody aircraft, such as the Boeing 787 Dreamliner and Airbus A350. This strategic initiative aligns United with other major global carriers like American Airlines and Delta Air Lines, focusing on enhancing fuel efficiency and improving the passenger experience for international travel. The investment in these advanced aircraft is aimed at meeting the growing demand for long-haul routes while also addressing operational costs and environmental goals. The move underscores a broader industry trend towards more technologically advanced and efficient fleets. No specific market reaction to this news was available in the search results.