There are four terminals at O'Hare International Airport that you can connect through:
- Terminal 1
- Terminal 2
- Terminal 3
- International Terminal 5
Visit our 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.
The O’Hare Airport Transit System (ATS or “people mover) is closed 24/7 to finalize modernization efforts and expansion of the system.
In order to maintain a travel connection between all of O’Hare’s terminals and parking lots, the CDA will operate shuttle buses to transport passengers and employees between terminals (Terminals 1, 2, 3 and 5) and from the terminals to each economy parking lot (Lots E, G, H); the Multi-Modal Facility, where rental cars are housed; and the Metra O’Hare Transfer station. The buses will operate continuously to ensure prompt and reliable service while the ATS is closed.
If connecting between domestic Terminals 1, 2 & 3, you DON’T have to take the shuttle buses, you can walk. Simply follow in-airport signage.
The CDA is committed to providing a quick and reliable bus shuttle service as the ATS modernization is finalized. The new ATS is scheduled to open in time for the 2019 Winter holiday travel season.
The International 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.
Terminal Transfer Bus (TTB) Terminal 1 and Terminal 3 Pickup Locations
- Gate B1
- Gate G17
- Gate K20
- Gate L24
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 here.
You can view the ATS route below, outlined in red. There are stops in each terminal as well as the economy parking lots.