FAA steps in to settle United–American turf war at Chicago O’Hare
March 5, 2026
The Federal Aviation Administration (FAA) has stepped in to settle a simmering rivalry between United Airlines and American Airlines at Chicago O’Hare International Airport (ORD). The intense competition between the two carriers has prompted federal intervention, with the FAA now moving to cap flights during the busy summer travel season.
The agency convened a “scheduling reduction meeting” with airlines on Wednesday, 4 March, to address what regulators say is an unsustainable surge in scheduled flights that risks overwhelming the airport’s infrastructure and air traffic control system.
What the dispute between United and American is about
At the heart of the conflict is a market-share battle between the two largest carriers at O’Hare, both trying to expand their hub operations.
- United Airlines, headquartered in Chicago, has been aggressively expanding its presence and plans to operate around 750 daily departures this summer, up sharply from recent years.
- American Airlines is attempting to rebuild its O’Hare hub after cutting capacity during the pandemic and has announced roughly 100 additional daily departures, bringing its schedule to over 500 departures on peak days.
American has openly criticised United’s scheduling strategy, describing it in a statement as “reckless scheduling,” as reported by CBS. The carrier claims United is overscheduling flights to secure gates and squeeze competitors, and warns this could lead to operational chaos at the airport.
United expands in Chicago after winning additional gates
A major trigger for the dispute was the City of Chicago’s 2024 gate reallocation decision, which granted United additional gate access at O’Hare as part of the airport’s long-running modernisation programme.
Unlike slot-controlled airports such as New York’s John F. Kennedy International Airport or LaGuardia Airport, O’Hare does not have federally regulated take-off and landing slots. Instead, agreements between airlines and the City of Chicago govern gate usage.
At the time, United argued the extra gates were necessary to support its hub strategy and announced a major schedule expansion. United described the growth as a natural result of strong demand for connections to Chicago.
Competitors feared United’s expansion could overwhelm airport capacity, limiting their operations.
Under the airport’s gate-allocation rules, airlines must maintain a minimum level of utilisation to retain access to their gates. If airlines do not use gates frequently enough, the city can reassign them to other carriers.
As a result, airlines have a strong incentive to schedule large numbers of flights to ensure gates remain active throughout the day.
Why O’Hare is especially vulnerable to congestion
O’Hare is particularly sensitive to overscheduling because of several operational constraints:
- Intersecting runways that reduce capacity during bad weather
- Ongoing terminal construction projects
- Heavy reliance on connecting traffic
- Dense airline hub operations
The vulnerability of the airport’s current infrastructure can lead to delays that cascade across the US network.
FAA may cap flights if airlines can’t agree
The current situation triggered a formal FAA process to address airlines’ overscheduled flights beyond airport capacity.
The FAA issued a Federal Register notice announcing a “scheduling reduction meeting” on March 4, 2026, in Washington, D.C.. In the notice, the FAA warned that the combined summer schedule surge in Chicago—3,080 daily operations on peak days compared to approximately 2,680 total operations on peak days last summer—would “stress the runway, terminal, and air traffic control systems.”
The meeting allowed airlines to propose schedule cuts before the FAA imposed restrictions. If airlines cannot voluntarily cut their schedules to address capacity constraints, the FAA is considering imposing a cap of about 2,800 daily operations at Chicago O’Hare this summer.
What began as a competition for gates and market share between United and American has escalated into a capacity battle at Chicago O’Hare, with federal regulators forced to step in to prevent the airport from becoming overwhelmed during the summer travel season.
The FAA’s intervention in an airline capacity battle at Chicago Airport is not new. The Federal Docket FAA-2004-16944, “Operating Limitations at Chicago O’Hare International Airport,” under which records of the current operational review will be kept, was first published by the regulator in 2004 to address capacity constraints at the airport at the time.
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