Chicago Department of Aviation

Supporting Projects

​More than 90 smaller-scale developments support the larger Signature Projects that act as the centerpiece of the O’Hare 21 terminal redevelopment initiative. A partial list is below; the O’Hare 21 team will expand this over the lifetime of the project.

Pedestrian Tunnels

Seven renovated pedestrian tunnels reopened beneath the Lower Level roadway connecting Terminals 1, 2 and 3 in June 2022. The tunnels are a key gateway in and out of the Main Terminals of O’Hare, connecting travelers to the Main Parking Garage and the CTA Blue Line station for easy, affordable access to the city.

Lower Level Utilities and Pavement Replacement

Completed in 2022, the Lower Level Utilities and Pavement Replacement project is a critical infrasturucre project for pedestrian safety and emergency management at Terminals 1, 2 and 3 at O’Hare.

Terminal 5 Parking Garage

O'Hare construction crews broke ground on a new, six-story parking garage at Terminal 5 in June 2022. When completed in 2024, the new garage will more than double the amount of available parking at the terminal, and expand capacity to offer a mix of short- and long-term parking options, like those available at the airport's main terminals

Runway 9C-27C Virtual Commissioning

This two-mile-long runway is the final new-build runway of the $6 billion OMP, the historic airfield reconfiguration project that set out to improve the airport’s capacity, efficiency, and reliability in all weather conditions.

L Concourse Expansion