The Airbus A321ceo is the most efficient single-aisle jetliner ever built. Its stretched fuselage – measuring 146 feet or 23 feet longer than the A320 – makes the A321 the longest and widest (12 feet, 1 inch) among all single-aisle aircraft. It can accommodate more seats and cargo, providing enhanced passenger comfort. PAL ordered a total of 45 A321s, gradually replacing the A320s to comprise the short-range fleet.