Chicago O'Hare Airport Inter-terminal Transfer
Terminal Transfer Options
Chicago O’Hare’s Airport Transit System (ATS) is a free 24-hour train that operates between all four terminals, the rental car center, long-term parking, the Metra train station and PACE bus stop.
The service operates every 3-5 minutes during peak hours, less often at other times.
The stations are located on the lower levels of the terminals, and are fully accessible to persons with disabilities. Elevators are available at each stop.