Yes, the Airbus A350 is fully capable of flying and landing safely with only one engine. In fact, it holds the world record for ETOPS (Extended-range Twin-engine Operational Performance Standards) with a rating of 370 minutes. This means that if one of its Rolls-Royce Trent XWB engines fails, the aircraft is certified to fly for more than six hours on the remaining engine to reach an emergency diversion airport. This rating covers 99.7% of the Earth's surface, allowing it to fly virtually any transoceanic route in a straight line. During certification, Airbus proved this by intentionally shutting down an engine mid-flight over the ocean and successfully completing a six-hour journey to a safe landing, demonstrating the aircraft’s incredible redundant power and aerodynamic efficiency.