United Airlines Holdings Inc. (NASDAQ:UAL) said Tuesday it will take delivery of more than 250 new aircraft by April 2028, marking the largest two-year fleet expansion by any airline. The move builds on its "United Next" strategy and aims to modernize operations while expanding premium offerings across its network.

The incoming fleet includes Boeing Company (NYSE:BA) 787-9 Dreamliners, Airbus SE (OTC:EADSF) A321neos, A321XLRs, and Boeing 737 MAX jets. The airline is also introducing a redesigned CRJ450 regional aircraft to connect smaller cities to major hubs.

Premium Experience Expands Across Cabins

United is extending widebody-style amenities to narrowbody aircraft. Its new Airbus A321neo "Coastliner" and A321XLR jets will feature lie-flat United Polaris seats with all-aisle access—previously limited to long-haul flights. The Coastliner will serve high-traffic transcontinental routes, including Los Angeles, San Francisco, and New York/Newark.

The A321XLR will replace older Boeing 757 aircraft on select international routes and enable new destinations in Europe and South America. Both models include upgraded seating, larger screens, and enhanced onboard connectivity.