Chicago O'Hare Global Terminal Pushed to 2033, Creating Decade-Long Opening for Proposed South Suburban Airport

Chicago O'Hare International Airport's Global Terminal, planned at approximately 2.2 million square feet to replace the existing Terminal 2, now has a 2033 completion target. The project is part of the O'Hare 21 modernization program, described as an $8.5 billion-plus investment aimed at increasing the airport's gate capacity by around 25%. The Studio ORD design concept, led by architect Jeanne Gang, was selected for the terminal.

Under the revised sequencing, a new Concourse E will be prioritized first, with its initial phase expected to break ground in late 2026, delivering 14 gates and targeting completion in 2030. Those gates are intended to free up capacity needed to support Global Terminal construction. United Airlines and American Airlines, O'Hare's two dominant hub carriers, reached an agreement with the City of Chicago in May 2024 over the program's cost and scope, and subsequently endorsed a phasing plan identifying the Global Terminal and Satellite 1 as mission-critical elements. O'Hare's top international routes last year included London Heathrow (1,047,000 passengers), Toronto (875,000), Cancun (798,000), Mexico City (768,000), and Frankfurt (713,000).

Separately, about 35 miles south of downtown Chicago, the State of Illinois is advancing procurement for the proposed South Suburban Airport, also known as Peotone Airport, in the Peotone and Monee area of Will County. The Illinois Department of Transportation is running a Request for Qualifications process to select a private developer to design, build, finance, operate, and maintain the facility under a Public-Private Partnership structure, with a key RFQ addendum issued on May 7, 2026. Illinois describes the facility as a supplemental commercial service airfield with potential roles in passenger service, cargo, corporate aviation, and general aviation. A study cited by the South Suburban Mayors and Managers Association estimated a cargo-focused version of the airport could create approximately 6,300 jobs and generate around $1 billion in regional economic activity, with an economic multiplier of $2.01 for every dollar invested.

Chicago Midway International Airport, the region's second commercial airport, is a major hub for Southwest Airlines, which holds a 91.1% share of Midway's market according to US Bureau of Transportation Statistics data. Frontier Airlines follows at 3.0%, Delta Air Lines at 2.8%, Volaris at 2.3%, and Allegiant Air at 0.5%. Adding South Suburban Airport would create a three-airport commercial system for the Chicago region.

A slip from an earlier target to 2033 on a project of this scale shows how hub terminal reconstructions can stretch across a full decade once phasing is renegotiated between an airport operator and its anchor carriers. Resequencing work so that Concourse E's 14 gates arrive by 2030 before the Global Terminal follows a familiar logic in large capital programs: deliver capacity that unlocks the next phase rather than building everything in parallel.

The South Suburban Airport proposal illustrates how a region can use a prolonged hub construction window to make the case for supplemental capacity, particularly when the pitch is cargo, corporate aviation, and low-cost service rather than a competing hub model. That positioning matters because O'Hare and Midway are built around different carrier concentrations, and a third airport's economics would depend on filling a gap neither currently serves.

What happens next depends on Illinois completing the RFQ process and selecting a developer, then clearing planning, environmental, design, and financing steps before construction can even begin. Until a developer is under contract, the South Suburban project remains a procurement exercise running in parallel with O'Hare's construction timeline, not a confirmed addition to the region's airport system.