The A321XLR can fly 5,400 miles or roughly a 10-hour flight, carrying 180 to 220 passengers in a two-class layout including a lie-flat business class.
The aircraft is likely to prompt a swathe of orders from Asian airlines looking to start low-cost long-haul services to Europe, as it can also carry 244 passengers in a single class layout.
Extra fuel tanks on the aircraft mean it can fly 15% further than the current long-range version now being introduced on some transatlantic routes.