Chicago O’Hare International Airport is changing the order of its multibillion-dollar redevelopment as an increasingly crowded gate environment threatens to put the brakes on growth by United Airlines and American Airlines.
The Chicago Department of Aviation has decided to move the first phase of the new Concourse E forward, with construction expected to begin later in 2026. The first 14 gates are scheduled to enter service in 2030, followed by another 10 gates in 2034.
The change may look like a routine adjustment to a huge airport construction program. It is anything but that.
O’Hare is dealing with a problem that major hub airports would generally like to have: its two largest airlines want to add more flying, but the airport does not have enough gates to accommodate all of that growth comfortably.
That pressure has now become significant enough to alter the sequence of ORDNext, Chicago’s long-planned transformation of the central terminal area.
According to the latest plan, construction of the new Concourse E will begin while work on Concourse D is still underway. The move is intended to provide additional capacity before construction of the new O’Hare Global Terminal reaches its most disruptive stages.
The result is a notable change in priorities. A project that had previously been pushed toward the back of the redevelopment schedule is now being brought forward because O’Hare needs the gates sooner.
O’Hare Has a Gate Problem Before It Has a New Terminal
O’Hare is already one of the world’s most important airline hubs, with United Airlines and American Airlines accounting for much of the airport’s activity.
The Chicago Department of Aviation lists 199 passenger gates at O’Hare as of April 2026. United leases 99 gates, while American leases 66, leaving the two dominant carriers with the overwhelming majority of the airport’s gate footprint.
That concentration makes gate availability particularly important.
United’s operation is centered on Terminal 1, while American has its main base in Terminal 3. Terminal 2 sits between the two major operations and is scheduled to disappear as part of the redevelopment.
That creates a complicated problem.
Chicago wants to replace Terminal 2 with the O’Hare Global Terminal, the centerpiece of ORDNext. But tearing down and rebuilding a major portion of the terminal complex cannot happen without creating additional pressure on the gates that remain available.
In other words, Chicago needs more capacity before it can comfortably remove some of its existing capacity.
That is where the new Concourse E becomes critical.
Why Concourse E Suddenly Matters
The new Concourse E is not the same facility as the existing Concourse E at Terminal 2.
Today’s Terminal 2 contains a 16-gate Concourse E. That facility will eventually disappear along with the existing terminal as the Global Terminal project progresses.
The new Concourse E will instead be a separate satellite facility located west of the central terminal area. It will eventually provide 24 gates in two phases.
The first phase will deliver 14 gates in 2030. A second phase will add another 10 gates in 2034. The revised construction sequence brings the first phase forward so that Chicago can add capacity while the wider redevelopment continues.
That timing matters because O’Hare cannot simply pause airline growth until the entire redevelopment is complete.
United and American have both been pursuing substantial schedule expansion at the airport. At the same time, O’Hare has faced operational restrictions because demand has been running ahead of the infrastructure available to support it.
The Federal Aviation Administration has imposed operating limitations at O’Hare, with construction and capacity constraints forming part of the wider challenge. FAA documentation says ORDNext is expected to create 28 new narrowbody-equivalent gates and three new concourse structures by the middle of the 2030s.
That makes every additional gate strategically important.
Concourse D Is Already Under Construction
The first major piece of the satellite-concourse strategy is already taking shape.
Chicago began construction on the new Concourse D in August 2025. The facility is planned to provide 19 gates and is expected to open in late 2028.
A major construction milestone arrived this summer when a 14-story tower crane was erected at the site. Chicago officials described the project as the largest new passenger facility to be built at O’Hare in more than three decades.
Concourse D is therefore moving ahead as planned.
But the revised ORDNext schedule means Chicago will no longer wait for D to be completed before beginning the first phase of Concourse E.
That is a significant change from the earlier sequencing.
The Global Terminal Remains the Centerpiece
Despite the acceleration of Concourse E, the O’Hare Global Terminal remains the most important component of the redevelopment.
The new terminal is intended to replace the existing Terminal 2 and create a modern facility where domestic airlines and international partner carriers can operate within a more integrated terminal environment.
Under the revised timeline, construction of the Global Terminal is expected to begin in 2029, with the facility targeted for completion in 2033.
That means Chicago will effectively be building several major pieces of the airport simultaneously.
Concourse D is targeted for 2028.
The first phase of Concourse E is expected in 2030.
The Global Terminal is targeted for 2033.
The final phase of Concourse E is scheduled for 2034.
It is an enormous construction program, but the revised order reflects a basic reality: O’Hare needs additional gates before the old terminal complex can be dismantled and replaced.
United and American Are Changing the Equation
The biggest reason for the shift is the growth ambitions of O’Hare’s two largest airlines.
United had planned a record summer schedule at Chicago, initially targeting as many as 750 daily departures. Although operational restrictions forced the carrier to scale back that plan, United still expects to operate hundreds of daily flights from the airport.
American is also increasing its presence.
After years in which the carrier reduced some aspects of its Chicago operation, American has been rebuilding its schedule and adding capacity. The competition between the two airlines has consequently become increasingly visible in O’Hare’s gate allocation.
That competition has even spilled into legal disputes over how airport gates should be assigned.
The result is a rare situation in which the airlines’ expansion plans are directly influencing the physical redevelopment of one of the world’s largest airports.
Instead of waiting for the final stages of ORDNext to provide additional capacity, Chicago is now bringing some of that capacity forward.
A $8.8 Billion Project Is Being Rewritten Around Demand
ORDNext is one of the most ambitious airport redevelopment programs in the United States.
The current plan is valued at approximately $8.8 billion and includes the Global Terminal, satellite concourses and supporting infrastructure designed to increase capacity and modernize O’Hare’s passenger facilities.
But large airport projects rarely proceed exactly as originally envisioned.
The earlier sequencing was shaped in part by rising costs and concerns from the airlines that would ultimately help finance the program. A 2024 agreement between Chicago, United and American placed greater emphasis on moving ahead with Concourse D and the Global Terminal while delaying the second satellite concourse.
The latest change shows how quickly the priorities can shift when demand rises.
The issue is no longer simply how much the redevelopment costs.
It is also how much it costs the airlines to wait.
For United and American, every unavailable gate can restrict additional flights, complicate aircraft scheduling and make it harder to expand at one of their most strategically important hubs.
For Chicago, that creates a strong incentive to provide capacity sooner.
What the New Timeline Means for O’Hare
The revised plan effectively turns Concourse E into a bridge between today’s O’Hare and tomorrow’s Global Terminal.
The 14 gates coming in the first phase will give the airport additional room before the Global Terminal opens. That capacity could be especially valuable during the years when construction activity is at its most disruptive.
The strategy also gives Chicago greater flexibility.
Rather than trying to complete the entire redevelopment in one long sequence, the airport can bring capacity online in stages.
That matters at an airport where demand is already high.
The FAA’s construction outlook shows just how extensive the work around O’Hare will be, with multiple projects affecting the terminal area and surrounding infrastructure over several years.
For passengers, the immediate result will not necessarily be a brand-new terminal experience. Construction will remain a fact of life at O’Hare for years.
But the long-term objective is much larger.
O’Hare Is Building for the Next Wave of Airline Growth
The most revealing part of the Concourse E decision is what it says about O’Hare’s future.
Chicago is not accelerating construction because the airport suddenly discovered that it wants another 14 gates.
It is doing so because United and American are already pressing against the limits of the existing infrastructure.
That makes the new Concourse E an important piece of the airport’s growth strategy rather than a secondary addition to ORDNext.
When the first 14 gates open in 2030, O’Hare should have more room to handle airline growth while the Global Terminal is being built. Four years later, another 10 gates are expected to join them.
By then, the airport will be approaching a very different configuration from the one passengers know today.
The current Terminal 2 will be gone, the Global Terminal will be operating, Concourse D will be established and the new Concourse E will be nearing its full 24-gate configuration.
For Chicago, that is the bigger story.
O’Hare’s redevelopment is no longer simply about replacing aging infrastructure. It is increasingly about keeping up with airlines that are unwilling to wait for the airport to catch up.
The decision to accelerate Concourse E is therefore a sign of just how valuable gates have become at one of the world’s most important aviation hubs.
And with United and American continuing to compete for growth at O’Hare, that pressure is unlikely to disappear anytime soon.
For more on Chicago O’Hare, see: FAA Extends Chicago O’Hare Flight Cap Until 2027
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