Frontier Airlines is expanding its U.S. domestic network with 15 new routes launching this fall, including service to two new cities and a return to Tulsa, Oklahoma.
The growth is part of the airline’s broader transformation strategy as it works to evolve its business model. By introducing product upgrades, such as new first-class seating, Frontier aims to enhance its value proposition and appeal to a wider segment of travelers.
Starting in October, the Denver-based ULCC will launch nonstop flights from Corpus Christi, Texas, and Richmond, Virginia—both new destinations for the airline—while resuming service to Tulsa, which it last served in 2022.
The 15 new routes include a mix of high-demand and underserved markets, with only two—Corpus Christi–Denver and Newark–Chicago Midway—currently unserved by any airline during the summer 2025 season. Other new sectors include Atlanta–Richmond, Dallas–Tucson and Salt Lake City–Santa Ana, along with several new connections from Frontier’s Denver hub, including flights to New York JFK.
According to OAG Schedules Analyser data, Kansas City–Tampa and Phoenix–San Antonio are being restored after being discontinued in 2018, while Denver–Tulsa and St. Louis–Tampa were last served in 2022 and 2023, respectively.
Frontier is scheduled to operate 376 nonstop routes in July 2025, slightly more than the 373 it flew a year earlier. However, the airline’s summer capacity is down to 24.9 million seats, compared with 27.2 million in 2024, reflecting a more disciplined approach to scheduling.
The route expansion comes as Frontier continues to reshape its onboard experience. The airline plans to introduce a new first-class product beginning in late 2025, designed in partnership with Italian seat manufacturer Geven. Additional enhancements under evaluation include onboard Wi-Fi and expanded loyalty offerings.
Meanwhile, competitor Spirit Airlines announced the addition of Key West, Florida, to its route map—the carrier’s first service to the southernmost city in the continental U.S. Flights from Fort Lauderdale will begin Nov. 4, operating four times per week before increasing to daily on Dec. 18. The move follows the opening of Key West International Airport’s new Concourse A in May as part of a $130 million upgrade.
Spirit exited Chapter 11 in March—a month after declining a renewed merger offer from Frontier, opting instead to proceed with a standalone restructuring strategy.
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