A321ceo - (ceo = current engine option) - a most efficient single-aisle jetliner. As the longest-fuselage member of Airbus’ best-selling, single-aisle A320 Family, the A321’s cabin offers passengers even more space. Able to comfortably seat anywhere from a typical 170 to 200 passengers in a standard two-class cabin up to 220 travelers in a more high-density layout, the A321 – with a wider cabin than any of its competitors – continues to define the meaning of single-aisle comfort in operations around the globe. It is equipped with either CFM56 or IAE V2500 engines.