There are four terminals at O'Hare International Airport that you can connect through:
- Terminal 1
- Terminal 2
- Terminal 3
- Terminal 5
airlines page to reference which airlines operate out of each terminal.
The domestic terminals, Terminals 1-3, are connected and all easily accessible from each other. If you arrive on a domestic flight and have a connecting domestic flight, you will have access to Terminals 1-3 upon arrival without having to clear the security checkpoints. If you have a connecting domestic flight via two different carriers, please
contact your airlines for detailed instructions and information regarding checked luggage.
Passengers with domestic connections in Terminal 5 may travel from Terminal 1-3 via the
Terminal Transfer Bus [TTB Service Has Been Temporarily Suspended] (boarding pass required) or via the
While most international flights depart from Terminal 5, some depart from Terminals 1-3. Please visit our airlines page to reference which terminal an airlines operates from.
Terminal 5 is not connected to the domestic terminals and is accessible via the
Airport Transit System (ATS). If you arrive on a domestic flight and must connect to an international flight, you have two options: 1.) you can take the ATS and pass through the security checkpoint in Terminal 5 or 2.) you can take a Terminal Transfer Bus (TTB) from Terminal 3 to Terminal 5 and bypass the security checkpoint in Terminal 5. The Terminal Transfer Bus service is year round with operation hours as follows: 11:00 am - 9:00 pm. If you are arriving into the domestic terminals and need to collect your luggage (exit the security side of the airport) and recheck in T5, you will not be able to use this service.
TTB SERVICE HAS BEEN TEMPORARILY SUSPENEDED - TTB service takes travelers from the domestic terminals (1, 2, & 3) to Terminal 5 without having to exit security or be rescreened in Terminal 5 at the TSA checkpoint.
If you arrive at O'Hare on an international flight and have a connecting domestic flight, you will arrive at Terminal 5 and will need to take the
ATS to the domestic terminals. You will need to clear security again at the domestic terminals.
Our international traveler page contains all the information you will need for an international connection. You can also use our Transfer Guide found
You can view the
ATS route below, outlined in red. There are stops in each terminal as well as the
economy parking lots.