The Airline CEO Filling a Spirit-Sized Hole in the Market

Frontier Airlines CEO Jimmy Dempsey is actively working to enhance the airline's performance by focusing on operational improvements and the introduction of premium services. This strategic shift is designed to fill the market void created by the recent collapse of Spirit Airlines.

Spirit Airlines, which pioneered the ultra-low-cost carrier (ULCC) model in the U.S., ceased operations on May 2, 2026, after re-entering Chapter 11 in August 2025 and failing to secure rescue financing. This exit has significantly reshaped the competitive landscape, particularly for ULCCs.

Frontier has emerged as the primary beneficiary of Spirit's departure. Analysis of routes previously served by Spirit shows that Frontier has increased its capacity by approximately 1.3 million seats year-on-year for the June-August 2026 period, representing about a 70% rise. This expansion has boosted Frontier's share of available seats in these markets from 5.6% to 10.4%. For September 2026, Frontier is projected to have added over 415,000 seats compared to September 2025.

Other airlines have also expanded, but to a lesser degree. JetBlue has added over 500,000 seats on former Spirit routes, especially in Fort Lauderdale, Spirit's former hub, and is planning its largest schedule ever with nearly 130 daily departures this summer. Breeze Airways has also grown, adding approximately 134,000 seats. Legacy carriers like United and American have added about 334,000 and 299,000 seats respectively, while Delta's capacity remains largely unchanged, and Southwest has added about 130,000 seats.

Despite the expansion by various carriers, nearly half of Spirit's former capacity remains unfilled. Overall capacity across the former Spirit network is still down 8.8% year-on-year for the summer, and more than 20 former Spirit routes have no scheduled service. While airlines have focused on more attractive routes, thinner leisure and VFR markets are underserved or have lost service entirely. By September 2026, about 60% of Spirit's former capacity is expected to be replaced.