United Airlines increased capacity more than all North American carriers

United Airlines has added over 1.1 million seats this month, a 7% increase from last year, by replacing smaller regional jets with larger mainline aircraft. This strategy aims to enhance capacity and profitability as the airline industry rebounds. American Airlines remains the busiest US carrier, serving nearly 22 million passengers in March. In contrast, Spirit Airlines has reduced its capacity by 12%, losing about 540,500 seats compared to last year, reflecting operational challenges. Allegiant Air has seen a significant capacity increase of 22%, while Breeze Airways expanded by nearly 50%. The overall landscape shows mixed trends, with some airlines growing and others cutting back on available seats.