Frontier Airlines has wiped 10 nonstop routes off its Phoenix Sky Harbor International Airport schedule, cutting connections to cities including Seattle, Chicago Midway, St. Louis, Cincinnati, Kansas City, San Antonio, Reno, Spokane and Portland. The airline has served Phoenix for 31 years, but the newly trimmed lineup removes roughly 11% of the flights it had offered there compared with the same September-to-December stretch in 2025.
The cuts were detailed in a route-by-route breakdown published by Simple Flying, which compared Frontier's scheduled Phoenix network for September through December 2026 against the equivalent period a year earlier. Despite the route losses, Frontier still plans to operate 15 routes out of Phoenix during that window, with an average of 18 daily departures and a range between 13 and 24 daily departures depending on the week. Phoenix remains Frontier's ninth most-served airport nationwide, though its ranking there slipped two spots compared with the same period last year, according to the outlet's analysis.
Which Routes Disappeared, and How Full Were They
Frontier's ended routes ran the gamut from strong performers to weak ones. On Phoenix-Chicago Midway, the carrier had carried 378,820 round-trip passengers with an 86.3% load factor, per data attributed to the U.S. Department of Transportation and cited by Simple Flying. Phoenix-Seattle posted a 335,211 round-trip passenger count and an 81.1% load factor, while Phoenix-Cincinnati moved 448,577 round-trip passengers at a 78.8% load factor and Phoenix-Portland carried 271,960 round-trip passengers at 77.9%.
Other discontinued routes ran noticeably thinner. Phoenix-Reno managed just 5,359 round-trip passengers with a 33.3% load factor, and Phoenix-Spokane carried 9,233 round-trip passengers at a 51.7% load factor. Phoenix-Kansas City saw 42,818 round-trip passengers at a 59.9% load factor, Phoenix-St. Louis carried 42,288 round-trip passengers at a 73.7% load factor, and Phoenix-San Antonio moved 34,367 round-trip passengers at a 76.7% load factor — all figures again attributed to Department of Transportation data by the outlet.
One Route Added: Minneapolis Returns With Bigger Jets
Even as it pulled routes, Frontier added Phoenix-Minneapolis-Saint Paul back to its map, resuming the service in February 2026 after previously flying it from January 2023 through April 2025. The 1,109-nautical-mile route is now running two weekly flights for the remainder of 2026, with weekly departures reportedly climbing to 77 by mid-November — up from 75 in the equivalent week of 2025. Frontier plans to fly the route primarily with its 186-seat Airbus A320neo, supplementing with the larger 230-seat A321ceo and 240-seat A321neo aircraft.
Frontier is a distant player on that particular corridor. Southwest Airlines operates three weekly Phoenix-Minneapolis flights, American Airlines runs 14 weekly flights, Sun Country flies the route 16 times weekly, and Delta Air Lines dominates with 42 weekly flights on the corridor, according to the same Simple Flying analysis.
A Familiar Pattern: Seattle-Area Flying Also Axed
Frontier separately ended its Phoenix-to-Seattle Paine Field International Airport route, a 985-nautical-mile hop that carried 8,680 round-trip passengers across 50 departures between June and December 2025, with a 45.1% load factor. Alaska Airlines has served that same Phoenix-Seattle-area market since 2019 and carried 101,389 passengers there in 2025 with an 81.6% load factor, per the outlet's reporting.
Despite the route reductions, Frontier's overall Phoenix departures are still rising. The carrier is set to reach 24 daily Phoenix departures beginning October 9, and its daily departures companywide are up 12% year-over-year, with March 2026 marking its highest Phoenix activity at 37 departures that month. Frontier plans to serve 86 airports and average 313 daily departures systemwide between September and December 2026.
Part of a Bigger Nationwide Pullback
The Phoenix cuts are not happening in isolation. Frontier announced a broader nationwide network contraction in June 2026 that included exiting six cities — Spokane and Corpus Christi, Texas among them — and eliminating or suspending more than 20 domestic and international routes during the third quarter, according to Simple Flying's earlier coverage of the airline's schedule overhaul. Frontier cited difficulty sustaining low-frequency, single-route destinations as a driver of those cuts.
Phoenix wasn't the only major hub to see routes disappear this year. Frontier previously dropped eight routes from Chicago O'Hare International Airport in August, including its Phoenix nonstop connection, a move Hoodline reported pushed O'Hare from 11th to 19th among the carrier's most-served airports, despite several of those routes maintaining load factors above 80%.
The Financial Pressure Behind the Cuts
The route trimming reflects a systemwide shift Frontier rolled out in 2024, moving more than 80% of its flight schedule to an “out-and-back” model designed to return crews and aircraft to home bases nightly, according to Forbes. Executives have projected the strategy could reduce annual overhead by roughly $200 million, mirroring approaches used by European ultra-low-cost carriers.
The airline has also been under financial strain. Frontier Group Holdings reported a net loss of $272 million for the first quarter of 2026, weighed down by $139 million in non-recurring charges tied to early aircraft lease returns and rising jet fuel expenses, even as it posted record adjusted revenue of $1.1 billion, according to Quartz. Fuel costs paid by the carrier rose 13% year-over-year during that quarter. Earlier in 2026, Frontier Group Holdings executed an early return of 24 leased Airbus A320neo aircraft with lessor AerCap and pushed back delivery of 69 additional A320neo-family jets originally slated for 2027 through 2030, delaying them to 2031 through 2033, per TravelPulse.
Frontier's Phoenix presence remains modest against the airport's dominant carriers. The airline held roughly 4.5% passenger market share at Phoenix Sky Harbor in 2025, carrying about 2.3 million passengers to rank fifth among carriers there, well behind American Airlines at 40.5% and Southwest Airlines at 33.3%, according to Road Genius. That's despite Phoenix Sky Harbor logging an all-time passenger record of 52,325,266 travelers in 2024, a 7.5% jump over 2023, per the City of Phoenix Aviation Department. Frontier opened a dedicated crew base at the airport in November 2022, initially staffing up to 180 pilots and 275 flight attendants, and has cycled through several high-profile routes there since, including now-discontinued nonstops to Philadelphia and Fort Lauderdale-Hollywood.
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