For the first time since 2019, Chicago O’Hare International Airport (ORD) has reclaimed the title of the nation’s busiest airfield by aircraft movements, edging out Hartsfield-Jackson Atlanta International Airport (ATL) in 2025, according to preliminary data from the Federal Aviation Administration (FAA).
New figures show O’Hare recorded 857,392 takeoffs and landings last year — a significant 10.5% increase from 776,036 movements in 2024. In comparison, Atlanta’s airport handled 807,625 operations in 2025, marking only modest growth from the previous year.
Chicago O’Hare Surpasses Atlanta’s Hartsfield-Jackson as Busiest U.S. Airfield by Aircraft Movements in 2025
This shift ends Atlanta’s recent streak at the top of this metric, though Hartsfield-Jackson — the longtime home base and primary hub for Delta Air Lines — has held the crown as the world’s busiest airport by passenger traffic for decades (with the exception of the 2020 pandemic year).
Key distinction: Movements vs. Passengers
While Chicago leads in the number of flights (aircraft movements), Atlanta continues to dominate in total passenger volume due to its use of larger aircraft and Delta’s efficient hub operations.
Industry data from sources like OAG indicate Atlanta offered around 63.1 million departing seats in 2025, compared to roughly 50.6 million at O’Hare — a gap of about 25%.
Passenger counts from the Bureau of Transportation Statistics and other reports consistently show Atlanta ahead in enplaned/deplaned travelers.
The difference stems from airline networks: O’Hare serves as a major hub for both United Airlines and American Airlines, which rely heavily on smaller regional jets for shorter, high-frequency routes across the Midwest and beyond.
This drives more takeoffs and landings per passenger. Atlanta, by contrast, features Delta’s strategy of larger mainline jets carrying more people per flight.
Aviation analysts point to competitive dynamics at O’Hare as a driving force. The airport’s dual-hub status for United Airlines and American Airlines has fueled a “capacity war,” leading to higher flight frequencies and more regional jet operations compared to Delta’s larger-plane strategy at ATL.
Chicago Mayor Brandon Johnson celebrated the milestone, stating: “This is more than a statistic, it’s a statement about Chicago’s momentum. From the runways of O’Hare to the neighborhoods across our city, Chicago is building, growing, and leading. We are open for business, open to the world, and once again setting the pace for the nation.”
For Atlanta travelers and the local economy, Hartsfield-Jackson remains the undisputed leader in passenger throughput and global connectivity.
The airport has consistently ranked No. 1 worldwide in passenger traffic in recent Airports Council International (ACI) reports, including for 2024, and continues to serve as a critical engine for Georgia’s aviation sector.
Looking ahead, intense competition between American and United at O’Hare could keep movements elevated, but experts note it’s unlikely Chicago will overtake Atlanta in passenger numbers anytime soon given Delta’s stronghold and Atlanta’s higher average aircraft size.
Final Word
Hartsfield-Jackson Atlanta International Airport remains the heart of global air travel — moving more people than any other airport on Earth — even as Chicago celebrates a win in flight activity. Stay tuned for final 2025 passenger rankings and full ACI World data later this year.
