Airport Transit System (ATS)

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.


Airport Transit System Signage

< 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 Remote Parking Lot E.

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.


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

 Click here to view the ATS route and stops.