Cathay Pacific operates both the Airbus A350-900 and the Airbus A350-1000 on its longest international routes. The aircraft family has become one of the airline's primary long-haul fleets because of its fuel efficiency, extended range and quieter cabin environment. For passengers spending more than 14 hours in the air, the A350 also offers improved cabin pressurization, higher humidity levels and larger windows compared with many older long-haul aircraft, helping create a more comfortable experience on ultra-long journeys. These features have made the A350 one of the preferred aircraft for airlines operating nonstop flights between North America and Asia.