United Adds 250+ Aircraft, Debuts Premium A321neo & CRJ450 SubfleetsUnited will add over 250 aircraft by 2028, launching new A321neo 'Coastliner' and CRJ450 subfleets to enhance its premium domestic offerings.Mar 26, 2026•5 min•United AirlinesA321neoCRJ450Fleet ExpansionSkyWestAirlines