Final assembly of the aircraft takes place in Hamburg, Germany, Mobile, Alabama, United States, Tianjin, China, and Toulouse, France. , a total of 3,338 A321 airliners have been delivered, of which 3,259 are in service. In addition, another 5,240 A321neo aircraft are on firm order. American Airlines is the largest operator of the Airbus A321 with 300 examples in its fleet.
Final assembly of the aircraft takes place in Hamburg, Germany, Mobile, Alabama, United States, Tianjin China, and Toulouse, France , a total of 3,338 A321 airlin.ers have been delivered, of .which 3,259 are in service In addition another 5,240 A321neo aircraft are on firm order. American ,Airlines is the largest operator of the Airbus A321 with 300 examples in its fleet.