O’Hare Concourse D Beam Signing Marks Start of Chicago’s $8.2B Airport Expansion
On the morning of April 22, Mayor Brandon Johnson joined the Chicago Department of Aviation and construction crews at 7344 N. Paulina St. for a ceremony that carries more weight than most ribbon-cuttings allow. The first beam signing for the new Concourse D at O’Hare International Airport marked the visible transition of a years-long infrastructure program from underground foundation work into the steel-and-glass phase that Chicagoans will eventually see rising on the airfield.
The event is one of several being held across the city as part of Construction Season 2026 and Mayor Johnson’s Build Better Together initiative, a week-long series of events highlighting infrastructure projects across Chicago departments and sister agencies. The Concourse D beam signing was among the most consequential stops on the schedule.
Thirty Years in the Making
Concourse D is the first major concourse built at O’Hare in more than 30 years. The $1.3 billion satellite structure will add 19 new gates designed for narrow-body aircraft, with the flexibility to adapt 18 of those gates into nine larger ports capable of accommodating wide-body planes.
After months of demolition, excavation, and underground foundation work, the project is now entering its vertical construction phase — the milestone that puts thousands of workers visibly on site and begins reshaping the airport’s footprint one structural column at a time. The project team, joint venture AECOM Hunt Clayco Bowa, has secured every permit needed to carry the work through completion, including caisson, foundation, tower crane, and a full building permit issued in early 2026. Structural steel is already being installed on site.
Site preparation for Concourse D began back in 2023, when crews constructed temporary taxiways, built a new grade-separated roadway, reconfigured Taxiway B, and added three temporary gates to Concourse C to maintain uninterrupted airline operations throughout the prep phase. Major construction launched in mid-2025 with demolition of existing taxiways, followed by several months of excavation and foundation work.
The Architecture of Orchard Field
The concourse has a design story embedded in its structure. Designed by Chicago-based Skidmore, Owings & Merrill in collaboration with Ross Barney Architects, Juan Gabriel Moreno Architects, and Arup, the concourse draws its design language directly from O’Hare’s original name — Orchard Field, a reference to the apple orchards that once occupied the site. That history is expressed through a series of dramatic tree-like structural columns that branch outward to support a 150-foot-wide long-span roof. The structural system reduces interior columns by nearly half, opening the floor plan to improve gate flexibility and ease passenger circulation.
At the northern end of the 590,000-square-foot building is a 40-foot-high atrium-like space connecting the structure’s three levels, marked by an oculus that directs daylight into the levels below. At the south end, a double-height glazed wall frames views of the airfield and the downtown Chicago skyline.
SOM Design Partner Scott Duncan described the intent: “From the skylit-tunnel connection to the orchard-inspired columns, the new concourse will offer bright, soaring spaces for passengers and enable world-class operations for airlines. We’re proud to be leading this bold new vision for O’Hare and to deliver such a complex project on budget for the City of Chicago.”
Planned amenities include more than 20,000 square feet of lounge space, 30,000 square feet of commercial space with restaurants and retail, and a 450-square-foot children’s play area. As one of Chicago’s first domestic-international codeshare concourses, Concourse D is designed for adaptability — built to accommodate a wide range of aircraft types while improving efficiency for both carriers and passengers. The international arrivals corridor will be suspended above the concourse floor, allowing arriving and departing travelers to move securely without crossing paths.
Jobs, Equity, and the Construction Workforce
CDA Commissioner Michael McMurray has put the economic stakes plainly: “Airport planning is not for the next year, it’s for the next generation.”
The Concourse D project and its associated infrastructure work are anticipated to create more than 3,800 construction jobs. Under Mayor Johnson’s leadership, the O’Hare 21 capital program carries a combined minority- and women-owned business participation rate of 37%.
The longer-term economic picture is substantial. A policy analysis of the full O’Hare 21 modernization program projects that completing the expansion will increase the number of passengers flying through O’Hare by 20%, generate $553 million annually from increased passenger travel relative to a no-build scenario, add $280 million in annual operating revenues after 2033, and increase state tax revenues by $39 million per year and local tax revenues by $24 million per year.
ORDNext: The Broader Plan
Concourse D is the opening chapter of a much larger program. The full ORDNext plan — the terminal expansion component of the $8.2 billion O’Hare 21 capital program — includes a second satellite concourse designated Concourse E with 24 gates, a replacement of Terminal 2 with the O’Hare Global Terminal, and a new underground tunnel system to connect passengers, airport employees, and baggage operations across the expanded facilities. Together, ORDNext will deliver 43 new gates across Concourses D and E.
The expansion arrives at a pivotal moment in O’Hare’s traffic history. O’Hare recently reclaimed the title of the nation’s busiest airport by aircraft movements, recording 857,300 total operations in 2025. That demand pressure underpins the urgency of the expansion, with United and American Airlines both recently purchasing gates from Spirit to deepen their Chicago presence.
Official figures released in April confirmed that in 2025, O’Hare recorded 860,015 aircraft operations — the equivalent of one takeoff or landing every 37 seconds, around the clock, every day of the year. The airport also ranked sixth globally by passengers, with 84.8 million travelers passing through its terminals, a 6% increase from 2024.
Commissioner McMurray was direct about what those numbers require: “O’Hare’s airfield leads the world in capacity, and now we must ensure our terminals, technology, and passenger experience rise to meet that standard. Continued investment is not optional — it is essential to maintaining Chicago’s global competitiveness.”
A Civic Milestone, Measured in Steel
A first beam signing is a construction tradition with symbolic weight. It is the moment a project moves from something that exists in contracts, permits, and architectural renderings to something that takes physical form against the skyline. For O’Hare — an airport that defined Chicago’s postwar growth, that held the title of the world’s busiest airport from 1963 to 1998, and that has carried the regional economy on its runways through decades of change — the steel going up on Concourse D is a statement about what the city expects of itself.
Mayor Johnson framed the investment in terms that reach beyond the terminal gates: “To maintain Chicago’s global leadership in the 21st century, we must continue investing in O’Hare, our region’s most powerful economic engine.”
Concourse D is scheduled for completion in late 2028. The rest of ORDNext will follow through the early 2030s. For a city that built its identity around being the place where everything connects, the work underway on the northwest side of the city is more than a construction project. It is, in the most literal sense, an infrastructure for Chicago’s next chapter.

