Connection between terminals

How to Move Between Terminals at O'Hare Airport

Navigating between O'Hare's terminals can be challenging, but services like the Terminal Transfer Bus (TTB) and the Airport Transit System (ATS) make it easier. These free transport options connect different airport areas efficiently, though passengers should plan for potential delays, especially during peak hours.

Terminal Transfer Bus (TTB)

The Terminal Transfer Bus (TTB) connects the secure areas of Terminal 5 with Terminals 1 and 3 (boarding pass required). This service is especially useful for passengers with connecting flights at gates M1-M40 in Terminal 5, allowing them to avoid exiting and re-entering through security. However, during the night, the TTB service is unavailable, and passengers must exit the secure area to board the ATS train, re-entering through TSA screening. According to reviews from July 2024, the TTB is generally reliable, though some passengers have reported overcrowding and delays during peak hours, particularly for international connections.

Traveler Tip:
To avoid missing your connection at Terminal 5, always check if the TTB service is operating and allow extra time in case of delays. Reviews have highlighted long waiting times during busier travel periods.

Frequency: every 15 minutes
Schedules: daily from 11:30 am to 9:30 pm
Stops: Terminal 1, Gate B1 - Terminal 3, Gates G17 and K20 - Terminal 5, Gate M13

Airport Transit System (ATS)

The Airport Transit System (ATS) is an automated people mover covering a 3-mile (4.8 km) loop, with a total journey time of just 10 minutes. It's a free service that connects Terminals 1, 2, 3, and 5 with key facilities such as the Multi-Modal Facility (MMF) for rental cars, Pace buses, Metra services, and parking areas.

While many passengers appreciate the convenience and frequency of the ATS, which runs every 3-5 minutes during peak times, some reviews from 2024 note occasional service interruptions due to ongoing maintenance. Passengers have expressed frustration over needing to switch to shuttle buses when the system is down, which can increase transfer times significantly.

Frequency: every 3-5 minutes during peak hours

Hours: Operates 24 hours a day

Traveler Tip:
If you're traveling during off-peak hours, or if the ATS is undergoing repairs, consider walking between terminals or using the shuttle buses. Travelers have reported mixed experiences, with some preferring to walk due to the delays caused by the ATS interruptions.

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