United Escalates Chicago Turf War, Vows to Block American’s Gate Expansion at O’Hare
CHICAGO, United States — United Airlines has intensified its high-stakes battle with American Airlines at O’Hare International Airport, with Chief Executive Scott Kirby declaring the carrier will deploy whatever resources necessary to prevent its rival from gaining additional gates in 2026.
The confrontation unfolded during United’s quarterly earnings call on Wednesday, where Kirby told analysts the airline was establishing firm boundaries in the Windy City. The executive pledged to increase flight frequencies regardless of cost to maintain United’s current gate allocation at what recently became the nation’s busiest airport by flight operations.
Chicago, United States stands as one of the few major American aviation markets where two legacy carriers maintain full-scale hub operations—a distinction that has transformed O’Hare into perhaps the most contested piece of real estate in domestic aviation.
At the heart of the dispute lies the Chicago Department of Aviation’s gate allocation system, which distributes terminal space based on the previous year’s departure volumes. This mechanism creates an annual zero-sum game where every flight added translates directly into competitive advantage. According to aviation analytics firm Cirium, United currently operates roughly half of all scheduled departures from the airport, compared to approximately one-third for American.
The competitive dynamic shifted significantly in late 2025 when a city-led reallocation granted United five additional gates while reducing American’s count by four. American challenged the decision in court but failed to secure an injunction, leaving the Fort Worth-based carrier searching for alternative paths to growth.
That search led to an unexpected opportunity. Spirit Airlines’ bankruptcy proceedings opened a door for American to acquire two gates in Terminal 3 for $30 million—gates G8 and G10, where one of American’s Admirals Club lounges is conveniently located. The transaction, approved by bankruptcy court in December, marked the first asset sale to a competing airline in Spirit’s second Chapter 11 filing.
United’s Kirby didn’t mince words about the financial realities he sees playing out in Chicago. The airline chief claimed United generated approximately $500 million in profit at O’Hare during 2025, while estimating American lost a similar amount. He projected American’s losses could balloon to roughly $1 billion in 2026 if current trends continue. American has not substantiated these figures and has consistently disputed Kirby’s characterizations of its Chicago performance.
The rivalry took on additional dimension this week when American unveiled three new routes from O’Hare just one day after Kirby’s pointed remarks. The carrier announced twice-daily service to Allentown, Pennsylvania, and Columbia, South Carolina, beginning in May, along with daily seasonal flights to Kahului, Hawaii, starting in December. All three routes directly overlap with United’s existing network.
American pushed back firmly against United’s assertions. In a statement, the carrier argued that dual-hub competition benefits travelers through lower fares and expanded options, calling it inherently good for Chicago’s economic development. The airline also highlighted its historic roots in the city, noting that the modern American Airlines traces its origins to a 1926 mail flight from Chicago to St. Louis.
The timing couldn’t be more significant. Federal Aviation Administration data confirmed that O’Hare reclaimed its position as America’s busiest airport in 2025, recording 857,392 aircraft movements—a 10.5 percent increase from the previous year. The milestone dethroned Atlanta’s Hartsfield-Jackson, which had held the title since 2020.
Both carriers are expanding aggressively. United plans nearly 650 daily departures this summer serving around 200 destinations. American intends to reach more than 500 daily departures during peak periods, its largest spring schedule at the airport in years. The carrier has added nearly 30 new destinations from O’Hare over the past year, including service to Honolulu, Mexico City, Madrid, and Chicago’s only nonstop to Naples.
Industry analysts remain skeptical that either airline will concede ground anytime soon. Jamie Baker of JP Morgan wrote that he does not expect American to abandon its Chicago ambitions, despite United’s aggressive posture and hometown advantage.
What happens when two aviation giants refuse to blink? Chicago’s travelers may find themselves witnessing an unprecedented capacity war with no clear end in sight—though whether that competition ultimately delivers the promised benefits of lower fares and better service remains an open question as both carriers dig in for a prolonged standoff.
This article was produced in accordance with our editorial standards. Aviantics maintains strict editorial independence.
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