Navigating O'Hare: Locating Terminal 4
For travelers flying through Chicago O'Hare International Airport (ORD), knowing your terminal is crucial for a smooth experience. While many travelers are familiar with Terminals 1, 2, and 3, the question "Where is Terminal 4 at O'Hare airport?" often arises, especially for those dealing with international arrivals or specific airline operations. Let's break down the location and function of Terminal 4 at ORD.
Understanding Terminal 4's Role at O'Hare
It's important to clarify that O'Hare International Airport does not currently have a physical structure designated as "Terminal 4" in the same way that Terminals 1, 2, and 3 are operational passenger terminals. This can be a source of confusion for some travelers. Historically, the space that is now the Multi-Modal Facility and Bus/Shuttle Center was sometimes referred to in discussions as a potential Terminal 4, or it housed various functions that might lead to that designation. However, for all practical purposes in current air travel at O'Hare, you will not be directed to a "Terminal 4" for check-in, security, or boarding of commercial flights.
What You Might Be Looking For: The Multi-Modal Facility
When people inquire about Terminal 4, they are often referring to the area that now houses the Multi-Modal Facility (MMF) and the Airport Transit System (ATS) station. This is a central hub for transportation and services, connecting various parts of the airport and the surrounding areas.
- Location: The Multi-Modal Facility is located west of the main airport terminals. It's easily accessible via the Airport Transit System (ATS), which connects all passenger terminals.
- Function: This facility serves as a key transportation nexus. It includes:
- A bus and shuttle center for numerous airlines, rental car companies, and off-site parking.
- Access to the CTA Blue Line train, providing a direct connection to downtown Chicago.
- Connections to various other public transportation options and ride-sharing services.
- Former International Terminal Functions: In the past, elements of what might be thought of as Terminal 4 were involved in international arrivals and processing. However, these functions have largely been integrated into other terminals or specialized areas.
Navigating Between Terminals
For travelers arriving at or departing from O'Hare, understanding the Airport Transit System (ATS) is key. The ATS is a free, automated train system that runs 24/7 and connects all of O'Hare's passenger terminals (1, 2, 3, and 5) and the Multi-Modal Facility.
If you are arriving on an international flight, you will typically arrive at Terminal 5 (the International Terminal). From Terminal 5, you can use the ATS to reach:
- Terminals 1, 2, and 3: If you have a connecting flight within the United States, you will likely need to proceed to one of these terminals for your next flight.
- The Multi-Modal Facility: If you are meeting someone, need to catch a bus, the 'L' train, or a rental car, you will take the ATS to the Multi-Modal Facility.
Important Note: Always confirm your specific airline and flight information. Airlines operate out of designated terminals. For example, United Airlines is primarily in Terminals 1 and 2, while American Airlines is in Terminal 3. Terminal 5 is for most international carriers.
So, Where Do I Go?
If you're asking "Where is Terminal 4 at O'Hare airport?" the most direct answer is that there isn't a designated passenger terminal by that name. Instead, focus on:
- Your airline's designated terminal: Check your ticket or your airline's website.
- Terminal 5 for international arrivals/departures.
- The Multi-Modal Facility for transportation connections.
The ATS is your best friend for moving between any of these locations seamlessly.
Key Takeaway: While the term "Terminal 4" might be encountered in historical contexts or discussions about airport infrastructure, for practical travel at O'Hare, you'll be dealing with Terminals 1, 2, 3, and 5, and the Multi-Modal Facility for transportation.
Frequently Asked Questions (FAQ)
How do I get from Terminal 5 to the Multi-Modal Facility?
You can use the free Airport Transit System (ATS). Follow the signs for the ATS within Terminal 5, board the train heading towards the Multi-Modal Facility, and it will take you directly there.
Why isn't there a Terminal 4?
The airport's terminal numbering and development have evolved over time. O'Hare's current operational passenger terminals are 1, 2, 3, and 5. The functions that might have been envisioned for a Terminal 4 are now handled by the Multi-Modal Facility and integrated into existing terminal operations.
Where do I go for rental cars?
Rental car services at O'Hare are accessible through the Multi-Modal Facility. You can take the ATS to this facility from any passenger terminal.
Can I walk between terminals?
You can walk between Terminals 1, 2, and 3 as they are connected by underground walkways. However, for travel to Terminal 5 or the Multi-Modal Facility, you must use the Airport Transit System (ATS).

