Transport Between Terminals (ATS)

Beginning January 22, 2018 through mid-March 2018, ATS service along the entire system will be shut down nightly from 6:45 p.m. to 4:45 a.m. (Mon.-Fri.).  Shuttle Bus Service will be provided during hours of non ATS operation.​  View Flyer

The Airport Transit System (ATS) is a quick and convenient way to get around O'Hare International Airport. The ATS is a free, 24 hour rail system that operates between the three domestic terminals (1, 2 and 3), the international terminal (5), all parking facilities, the Kiss 'n' Fly drop-off point, and the PACE Bus stop.​

Look for this sign when trying to locate the Transit System.

The ATS is fully automated and spans 2.7 miles, accommodating up to 2,400 passengers per hour. From beginning to end- Terminal 1 to Parking Lot E -the total travel time is just nine minutes. All points on the ATS route system are fully accessible to persons with disabilities, with elevators available at each of the stops.

Free, fully accessible shuttle buses transport visitors to the ATS station from Economy Parking Lots​ E and G.

At each ATS stop, there are escorts in green jackets to help point you in the correct direction. You can ask them where to find your gate number, a specific parking lot or your current location.

During the upcoming months many important projects are planned at O'Hare. When work occurs on or near the ATS tracks one or more of the following precautions may be taken for the safety of passengers and employees:

  • The Intervals Between Trains May Be Longer Than Usual
  • Trains May Travel At Slower Speeds Through The Work Areas
  • Trains May Be Held For Longer Dwells In Station
  • Only One Track May Be Used For Both Directions Of Travel On Some Parts of the Guideway (Track)

​O'Hare ATS Schedule

Time of Day Number of Trains Headway (Time Between Trains)
​Midnight - 4:30 am 1 two-car train ​20 minutes, 38 seconds
4:30 am - 1:00 pm ​5 two-car trains 4 minutes, 08 seconds
1:00 pm - 8:00 pm ​6 two-car trains 3 minutes, 26 seconds
​​​8:00 pm - 9:30 pm 4 two-car trains 5 minutes, 13 seconds
9:30 pm - Midnight ​2 three-car trains 10 minutes, 19 seconds

O'Hare ATS Schedule (Typical During Projects with Single Tracking)

Time of Day Number of Trains Headway (Time Between Trains)
Midnight - 4:30 am 1 two-car trains 20 minutes, 38 seconds
4:30 pm - 11:00 am ​2 three-car trains 10 minutes, 19 seconds
​11:00 am - 8:30 pm
​3 three-car trains 6 minutes, 53 seconds​
​​​8:30 pm - Midnight 2 three-car trains 10 minutes, 19 seconds
“Due to construction activities related to the ATS expansion, service may be restricted to just one track in some areas.  This could result in longer waits between trains as indicated in the schedules below.  Please allow extra time for your ATS travel.”

Click here​ to view the ATS route and stops.