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Chicago O’Hare Becomes Busiest U.S. Airport by Flight Operations in 2025

Chicago O’Hare surpasses Atlanta in 2025 as the busiest U.S. airport by flight operations, driven by growth from United and American Airlines.

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This article summarizes reporting by CBS News and journalist Todd Feurer.

Chicago O’Hare Overtakes Atlanta for Flight Operations Title

For the first time since 2019, Chicago’s O’Hare International Airports (ORD) has reclaimed the title of the busiest airport in the United States. According to reporting by CBS News, O’Hare surpassed Hartsfield-Jackson Atlanta International Airport (ATL) in 2025, ending Atlanta’s multi-year reign at the top of the Federal Aviation Administration (FAA) rankings for flight operations.

The shift in rankings highlights a significant resurgence in air traffic through the Midwest. Data cited in the report indicates that O’Hare’s rise was driven by a 10.5% year-over-year increase in operations. While Atlanta has long held the global crown for passenger volume, the metric for this specific ranking focuses on the sheer number of aircraft movements, takeoffs and landings, rather than the number of people flying.

By the Numbers: Operations vs. Passengers

It is essential to distinguish between the two primary metrics used to rank airport traffic: flight operations and passenger volume. While O’Hare has taken the lead in the number of planes moving through its runways, Atlanta remains the busiest hub for passenger traffic.

According to the preliminary 2025 statistics summarized in the report:

  • Chicago O’Hare (ORD): 857,392 operations.
  • Atlanta (ATL): 807,625 operations.

This data reveals a strategic divergence between the two hubs. Atlanta typically utilizes larger aircraft with higher load factors, allowing it to transport approximately 108 million passengers compared to O’Hare’s estimated 80 million, despite handling fewer individual flights. O’Hare’s volume is driven by its unique status as a dual-hub for two major carriers, United Airlines and American Airlines, which utilize a high frequency of smaller regional jets alongside mainline aircraft to feed their networks.

The “Capacity War” Driving Growth

The surge in flight operations at O’Hare is largely attributed to aggressive competition between its two largest tenants. Industry analysis suggests that a “capacity war” between United Airlines and American Airlines has significantly inflated flight numbers.

United Airlines has focused on solidifying O’Hare as its premier connecting hub, adding approximately 13 new domestic routes and increasing frequencies across its network. Simultaneously, American Airlines executed a strategy involving the addition of over 100 daily departures specifically targeting the spring break season, alongside new international routes to destinations such as Naples and Madrid.

This intense competition resulted in O’Hare being ranked as the “most connected” airport in the U.S. for 2025. On July 18, 2025, the airport offered more potential flight connections on a single day than any other facility in the country.

AirPro News Analysis: The Cost of Connectivity

While the reclamation of the “busiest” title is a marketing victory for the City of Chicago, we believe it presents a complex reality for travelers. The increase in flight frequency offers passengers more options and potentially lower fares due to carrier competition. However, this volume places immense strain on infrastructure that is currently under construction.

The data indicates a sharp trade-off between volume and reliability. O’Hare’s on-time performance hovered around 64% in 2025, significantly lower than Atlanta’s 79%. For the consumer, the choice between O’Hare and Atlanta may now come down to a preference for schedule frequency (O’Hare) versus operational reliability (Atlanta).

Infrastructure and Future Outlook

The traffic surge comes as Chicago continues its massive “O’Hare 21” modernization project. The city is currently constructing Satellite Concourse 1 and planning a new Global Terminal to replace Terminal 2. These projects are designed to integrate domestic and international operations more seamlessly, though construction logistics currently add to the complexity of ground operations.

Chicago Mayor Brandon Johnson welcomed the news as a sign of economic recovery for the region.

“This is more than a statistic, it’s a statement about Chicago’s momentum… We are open for business, open to the world.”

— Mayor Brandon Johnson (via City of Chicago press statements)

Aviation analysts expect the rivalry between United and American to persist through 2026, likely keeping flight volumes high. However, the gap in passenger numbers between Chicago and Atlanta is expected to remain, as Atlanta continues to maximize efficiency with larger airframes.

Frequently Asked Questions

Q: Is O’Hare the busiest airport in the world?
A: In terms of passenger traffic, no, Atlanta (ATL) generally holds that title. O’Hare is currently the busiest in the U.S. regarding flight operations (takeoffs and landings).

Q: Why did O’Hare beat Atlanta this year?
A: The primary drivers were aggressive schedule expansions by United and American Airlines, resulting in a 10.5% increase in flight operations year-over-year.

Q: Does more flights mean more delays?
A: Often, yes. In 2025, O’Hare reported an on-time performance rate of approximately 64%, while Atlanta maintained a higher reliability rate of 79%.

Sources

CBS News, City of Chicago Department of Aviation

Photo Credit: Chicago Department of Aviation

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Route Development

MET Terminal Opens at YHU Montreal Metropolitan Airport

Montreal Metropolitan Airport’s new MET terminal opened June 15, 2026, with Porter Airlines and Pascan Aviation as launch carriers.

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The new MET terminal at Montreal Metropolitan Airport (YHU) officially opened for commercial passenger flights on June 15, 2026, reintroducing scheduled Airlines service to the Longueuil site for the first time since 1940.

In a press release issued to mark the opening, airport officials highlighted the facility’s role as a second major commercial hub for the Greater Montreal area. The 21,000-square-meter terminal is designed to ease congestion at Montréal-Trudeau International Airport (YUL) and improve regional connectivity, supported by launch carriers Porter Airlines and Pascan Aviation.

Terminal specifications and launch operations

The newly constructed terminal features nine boarding bridges and a passenger waiting lounge with 900 seats. YHU Infrastructure Partners, a joint venture between Porter Aviation Holdings Inc. and Macquarie Asset Management, spearheaded the development.

Charles Roberge, President and CEO of YHU Terminal, stated that the project aims to create a simpler and smoother customer experience. Porter Airlines is utilizing the facility to launch 11 new routes, deploying its fleet of Embraer E195-E2 aircraft to bypass congested primary hubs. Porter Airlines CEO Michael Deluce noted that increased air service brings more trade and tourism opportunities to the region.

Pascan Aviation is also expanding its regional footprint at the Airports. Yani Gagnon, Co-owner and Executive Vice President of Pascan Aviation, indicated that the new terminal and a commercial agreement with Porter Airlines will allow the carrier to offer more flight options to regional travelers.

Historical context and labor disputes

The Saint-Hubert site originally opened in 1927 as Montreal’s primary aviation hub before commercial passenger operations shifted to Dorval in 1940. Construction on the new MET terminal began in August 2023. According to Simon-Pierre Diamond, Interim President of MET, a recent poll indicates that 80 percent of the population on Montreal’s South Shore supports the airport project.

The opening day was marked by a labor dispute involving one of the launch carriers. Flight attendants for Pascan Aviation, represented by the Canadian Union of Public Employees (CUPE) Local 5490, have been on strike since March 27, 2026. Striking workers picketed at the airport on June 15. CUPE-Quebec President Patrick Gloutney stated that the union is seeking a second collective agreement to secure better working conditions, alleging that Pascan Aviation is utilizing replacement workers during the strike.

AirPro News analysis

We view the opening of the MET terminal as a significant validation of Porter Airlines’ broader network Strategy. By investing in secondary airport infrastructure, Porter is replicating the model it successfully established at Billy Bishop Toronto City Airport (YTZ). This approach allows the carrier to offer passengers an alternative to the congestion and longer processing times typical of major international hubs. However, the ongoing labor dispute at Pascan Aviation presents an immediate operational friction point for the regional connectivity model the new terminal aims to foster. The success of this secondary hub will depend heavily on seamless integration between mainline and regional partners.

Sources: MET

Photo Credit: MET

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JFK New Terminal One ESG Report: Microgrid and Solar Array

JFK’s New Terminal One releases its first ESG report, detailing a 12-MW microgrid and the largest rooftop solar array on any U.S. airport terminal.

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The consortium behind The New Terminal One at John F. Kennedy International Airport (JFK) published its inaugural Environmental, Social and Governance (ESG) report on June 11, 2026, detailing the integration of a 12-megawatt microgrid and the largest rooftop solar array on any United States airport terminal.

Released in partnership with Manufacturers Schneider Electric and AlphaStruxure, the report outlines the facility’s energy resilience strategy. The terminal is a central component of the Port Authority of New York and New Jersey (PANYNJ) $19 billion airport-wide redevelopment program. According to the official press release, the project relies heavily on sustainable infrastructure financing, supported by more than $3.9 billion in green bonds issued across 2024 and 2025.

Microgrid and energy resilience

The terminal’s energy strategy centers on a 12-megawatt microgrid delivered by AlphaStruxure, a joint venture between Schneider Electric and The Carlyle Group. The system is provided under an Energy-as-a-Service (EaaS) model. This structure allows the terminal operators to secure long-term energy cost predictability without upfront capital expenditure.

The microgrid incorporates 13,000 rooftop solar panels, six onsite fuel cells, and a backup battery storage system. This infrastructure is designed to maintain terminal operations during regional grid disruptions and extreme weather events. Industry reporting from Facilities Dive indicates the microgrid will enable the terminal to meet 50% of its projected energy demand for the year 2050.

Chris Collins, Senior Vice President of Digital Buildings at Schneider Electric, stated that the terminal demonstrates how advancing energy technologies can help large-scale infrastructure reduce environmental impact and enhance operational reliability.

Terminal scale and phased opening

The New Terminal One represents a $9.5 billion investment within the broader JFK redevelopment. The facility spans a 134-acre footprint and will encompass 2.6 million square feet upon full completion. The terminal is designed to serve 23 million passengers annually.

The first phase of the terminal is scheduled to open in 2026. This initial phase includes new arrivals and departures facilities along with an initial 14 gates. When fully completed, the terminal will feature 23 gates.

“As we build a transformational international travel experience in the United States, Sustainability and resilience are not add-ons; they are foundational,” said Uzoamaka N. Okoye, Chief of Staff for The New Terminal One at JFK.

Alignment with Port Authority targets

The sustainability initiatives detailed in the ESG report align with broader regional environmental goals. The PANYNJ has established targets to achieve 100% zero-carbon electricity by 2040 and reach net-zero emissions across its facilities by 2050.

The integration of Schneider Electric EcoStruxure software will manage the complex energy inputs and outputs of the microgrid. This digital management system is intended to optimize efficiency as the terminal scales up operations over the coming decades.

AirPro News analysis

The reliance on an Energy-as-a-Service model for the New Terminal One microgrid highlights a shifting approach to airport infrastructure funding. By transferring the capital expenditure of a 12-megawatt power system to a joint venture like AlphaStruxure, airport developers can integrate advanced resilience features, such as fuel cells and extensive solar arrays, without inflating the initial construction budget. As extreme weather events increasingly threaten regional power grids, we expect to see more tier-one international hubs adopt decentralized microgrids to ensure continuous operations and protect revenue streams during wider outages.

Sources: Schneider Electric

Photo Credit: Schneider Electric

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Route Development

Southwest Airlines and Singapore Airlines Launch Interline Partnership

Southwest Airlines and Singapore Airlines announced an interline agreement on June 8, 2026, linking networks via LAX, SEA, and SFO.

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Southwest Airlines Co. and Singapore Airlines announced an interline partnership on June 8, 2026, enabling single-ticket travel across their respective networks through three shared United States gateway airports.

The agreement, detailed in a press release issued during the International Air Transport Association (IATA) Annual General Meeting in Rio de Janeiro, Brazil, marks Singapore Airlines as the eighth overseas carrier to join Southwest’s partnership portfolio. The arrangement connects Southwest’s domestic footprint with the SIA Group’s global reach, which encompasses more than 130 destinations across 35 countries and territories.

Network integration and gateway operations

The interline agreement facilitates passenger connections at Los Angeles (LAX), Seattle/Tacoma (SEA), and San Francisco (SFO). International travelers arriving on Singapore Airlines flights can transfer to nearly 120 airports within the Southwest network on a single booking, while U.S. travelers gain streamlined access to the SIA network.

Southwest Airlines Chief Operating Officer Andrew Watterson stated that the partnerships connects new geographies while maintaining high service standards for passengers transferring between the two carriers.

“Singapore Airlines becomes the eighth carrier in our partnership portfolio exemplified by its quality and reach. These carriers are facilitating access to our network for a growing global audience drawn to our improved onboard product and increasingly choosing to fly with us,” Watterson said.

Southwest’s 2026 product and route expansion

The partnership aligns with broader changes to the Southwest passenger experience implemented earlier in 2026. The carrier recently transitioned away from its traditional open-seating model, introducing assigned seating, optional extra legroom, and an updated boarding process designed to appeal to a wider demographic of travelers.

Alongside the cabin product updates, Southwest expanded its route map in 2026 by initiating service to five new destinations. The network additions include St. Thomas in the U.S. Virgin Islands, Sint Maarten, Santa Rosa/Sonoma County in California, Knoxville, Tennessee, and Anchorage, Alaska.

AirPro News analysis

We view this interline agreement as a strategic utilization of Southwest’s dense domestic network to capture international inbound traffic without the capital expenditure of operating long-haul widebody aircraft. By linking with a premium global carrier like Singapore Airlines at key West Coast hubs, Southwest can feed its domestic flights with high-yield international connecting passengers. The recent shift to assigned seating and premium legroom options likely makes Southwest a more palatable connecting partner for international travelers accustomed to traditional legacy carrier products, smoothing the passenger experience between a long-haul international flight and a domestic connection.

Sources: Southwest Airlines

Photo Credit: Southwest Airlines

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