
O'Hare International Airport is accessible via several transport links, including road, rail, and bus. The airport is directly served by Interstate 190, which offers interchanges with major roads such as Mannheim Road (U.S. 12 and 45) and the Tri-State Tollway (Interstate 294). I-90 continues as the Kennedy Expressway into downtown Chicago. For rail transport, the Chicago-area commuter rail system, Metra, has a transfer station at the northeast corner of the O'Hare Multi-Modal Facility. Additionally, the CTA Blue Line provides direct service to downtown Chicago, with its north terminus located at O'Hare Airport. Free shuttle buses also operate 24/7, contributing to congestion, with boarding available at the upper (departures) level of all terminals.
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What You'll Learn
- O'Hare Airport has 4 numbered terminals
- Terminal 1 is used by United Airlines, Lufthansa and All Nippon Airways
- Terminal 2 is used by United Express, United, Air Canada, Alaska Airlines and JetBlue
- Terminal 3 has 80 gates and is used by American Airlines, Aer Lingus, British Airways and others
- Terminal 5 is used for non-pre-cleared international arrivals

O'Hare Airport has 4 numbered terminals
O'Hare International Airport, also known as Chicago O'Hare International Airport and by its airport code ORD, is located in Chicago, Illinois. The airport has 4 numbered terminals—Terminal 1, Terminal 2, Terminal 3, and Terminal 5.
Terminal 1 is used for United Airlines, Lufthansa, and All Nippon Airways flights. It has 52 gates across two concourses, lettered B and C. Concourse B is attached to the main terminal, while Concourse C is a satellite terminal connected by an underground pedestrian walkway.
Terminal 2 serves most United Express and some United flights, as well as all Air Canada, Alaska Airlines, and JetBlue flights. It has 41 gates across two concourses, lettered E and F. The lower-numbered gates are located in the main terminal, with E gates on the right and F gates on the left, and the terminal then forks into the individual concourses.
Terminal 3 is used for American Airlines, Aer Lingus, British Airways, Iberia, Japan Airlines, and Spirit Airlines flights. It has 80 gates across four concourses, lettered G, H, K, and L. Concourses B and C feature a total of 52 gates, numbered B1 to B24 and C1 to C31. American Airlines renovated and expanded its facilities in Terminal 3 from 1987 to 1990, adding a flag-lined entrance hall to Concourses H and K.
Terminal 5 is used for Delta Air Lines, Frontier Airlines, and Southwest Airlines flights, as well as all international airlines that do not depart from Terminals 1, 2, or 3. Terminal 5 also handles non-pre-cleared international arrivals and contains customs facilities. It is located on the site of the airport's original cargo area, which was relocated in the 1980s.
In addition to the 4 numbered terminals, O'Hare Airport has 9 lettered concourses and a total of 213 gates—the most of any airport in the world. The airport offers a wide variety of services, including dining and shopping options, and provides easy access between concourses through a terminal transit train.
The airport is directly served by Interstate 190, which connects to other major highways. The CTA Blue Line provides direct service from O'Hare Airport to downtown Chicago via the Milwaukee-Dearborn subway.
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Terminal 1 is used by United Airlines, Lufthansa and All Nippon Airways
O'Hare International Airport is served by the Chicago Transit Authority (CTA) Blue Line, which provides direct service to downtown via the Milwaukee–Dearborn subway in the Loop and continuing to west suburban Forest Park. The airport is also accessible via Interstate 190, which offers interchanges with Mannheim Road (U.S. 12 and 45), the Tri-State Tollway (Interstate 294), and Interstate 90.
O'Hare International Airport has four numbered passenger terminals with nine lettered concourses and a total of 213 gates. Terminal 1 is used by United Airlines, Lufthansa, and All Nippon Airways. It has 52 gates across two concourses, lettered B and C. Terminal 1 is a major hub for United Airlines and also serves international flights for All Nippon Airways and Lufthansa. To access Terminal 1, hourly parking is available on Level 1 of the main garage, and the Hilton Chicago O'Hare Airport Hotel is located nearby, within walking distance via underground walkways.
The original Terminal 1 was demolished in 1984, and international flights were temporarily relocated to "Terminal 4" on the ground floor of the airport's central parking garage. A new 21-gate international terminal, now called Terminal 5, was completed in 1993 and houses all customs facilities. Terminal 5 is used for international arrivals and departures not served by Terminals 1, 2, or 3.
Terminal 2 at O'Hare serves most United Express and some United flights, as well as Air Canada, Alaska Airlines, and JetBlue. It has 41 gates across two concourses, lettered E and F. Terminal 3 is used by American Airlines, Aer Lingus, British Airways, Iberia, Japan Airlines, and Spirit Airlines. It has 80 gates across four concourses, lettered G, H, K, and L. American Airlines renovated and expanded its facilities in Terminal 3 from 1987 to 1990, adding a flag-lined entrance hall to Concourses H and K.
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Terminal 2 is used by United Express, United, Air Canada, Alaska Airlines and JetBlue
O'Hare International Airport is served by Interstate 190, which offers interchanges with Mannheim Road (U.S. 12 and 45), the Tri-State Tollway (Interstate 294), and Interstate 90. I-90 continues as the Kennedy Expressway into downtown Chicago. The airport has four numbered passenger terminals with nine lettered concourses and 213 gates, the most of any airport worldwide.
Terminal 2 is used by United Express, United Airlines, Air Canada, Alaska Airlines, and JetBlue. It has 41 gates across two concourses, lettered E and F. This terminal is also used for most United Express flights and some United Airlines flights.
United Airlines also operates out of Terminal 1, which is shared with Lufthansa and All Nippon Airways. Terminal 1 has 52 gates across two concourses, lettered B and C. Terminal 3 is used by American Airlines, Aer Lingus, British Airways, Iberia, Japan Airlines, and Spirit Airlines. With 80 gates across four concourses (G, H, K, and L), it is the largest terminal at O'Hare International Airport in terms of gate numbers.
Terminal 5, the international terminal, is used by Delta Air Lines, Frontier Airlines, and Southwest Airlines, as well as all international airlines that do not depart from Terminals 1, 2, or 3. It is also used for non-pre-cleared international arrivals and houses customs facilities.
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Terminal 3 has 80 gates and is used by American Airlines, Aer Lingus, British Airways and others
O'Hare International Airport in Chicago is served by Interstate 190, which offers interchanges with Mannheim Road (U.S. 12 and 45), the Tri-State Tollway (Interstate 294), and Interstate 90. The airport has four numbered passenger terminals with nine lettered concourses and a total of 213 gates, the most of any airport in the world.
Terminal 3 has 80 gates and is used by American Airlines and its Oneworld partners, including Alaska Airlines, Iberia, Japan Airlines, JetBlue Airways, Qatar Airways, Royal Jordanian, and Vueling Airlines. The terminal consists of four concourses: G, H, K, and L. Each concourse offers a variety of gates and amenities to cater to the needs of travellers.
American Airlines renovated and expanded its existing facilities in Terminal 3 from 1987 to 1990, adding a flag-lined entrance hall to Concourses H and K. Terminal 3 opened in 1960 and has undergone several renovations since then. It is currently undergoing significant renovations under the $300 million ElevateT3 project, which is expected to be completed by 2027.
The terminal is connected to the rest of the airport by the Airport Transit System (ATS), which provides seamless access to other terminals, parking areas, and public transportation options. Passengers with long layovers can explore dining and shopping options, relax in one of the lounges, or visit nearby attractions.
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Terminal 5 is used for non-pre-cleared international arrivals
O'Hare International Airport in Chicago, Illinois, is accessible via the CTA Blue Line, which provides direct service to downtown. The airport is also served by Interstate 190, which offers interchanges with Mannheim Road, the Tri-State Tollway, and I-90, which continues as the Kennedy Expressway into downtown Chicago.
O'Hare has four numbered passenger terminals with nine lettered concourses and a total of 213 gates. Terminal 5, the last terminal to be built, is used for Delta Air Lines, Frontier Airlines, and Southwest Airlines flights, as well as all international airlines that do not depart from Terminals 1–3.
Terminal 5 is also designated for non-pre-cleared international arrivals. This means that all international flights that do not depart from Terminals 1, 2, or 3 will arrive at Terminal 5. Terminal 5 is located a short distance from the other terminals and is connected by shuttle services and the Airport Transit System. It contains all customs facilities and is currently the only terminal at O'Hare that handles international arrivals that have not been pre-cleared.
The terminal transfer bus service at O'Hare International Airport provides transportation for domestic arrival passengers travelling between Terminals 1, 2, or 3 and Terminal 5 for connecting flights. This service is not available for international passengers arriving at Terminal 5 with connections in Terminals 1, 2, or 3.
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Frequently asked questions
O'Hare International Airport is served by the CTA Blue Line, which provides direct service to downtown via the Milwaukee–Dearborn subway in the Loop and continues to west suburban Forest Park.
O'Hare airport is directly served by Interstate 190, which offers interchanges with Mannheim Road (U.S. 12 and 45), the Tri-State Tollway (Interstate 294), and Interstate 90.
Free shuttle buses run 24/7 at O'Hare, boarding on the upper (departures) level of all terminals. The Bus Shuttle Centre is located on the ground level of the parking garage between Terminals 1–3 and opposite the Hilton Hotel.










































