How many terminals does O Hare airport have?

Terminals. O'Hare has four numbered passenger terminals with nine lettered concourses and a total of 213 gates. Terminal 1 is used for United Airlines flights, as well as international departures by Lufthansa and All Nippon Airways. It contains 52 gates on two concourses, lettered B–C.



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Airlines that use gates at Terminal 5 include Air France, Air India, Aer Lingus, Aeromexico, Alitalia, American, British Airways, Cathay Pacific, Copa Airlines, Etihad, JAL, KLM, Korean Air, LOT Polish Airlines, Lufthansa, Qantas, Qatar Airways, Royal Jordanian, SAS, Turkish Airlines, United Airlines, and more.

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While international flights arrive and depart from all the other O'Hare terminals, Terminal 5, which contains only one concourse, Concourse M, is mostly devoted to international flights.

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Domestic Terminals 1, 2, and 3 are connected to each other and you can easily walk between them or take moving sidewalks and escalators. The walk from Terminal 1 to Terminal 2 takes about 10 minutes, and from Terminal 1 to Terminal 3 can take up to 20 minutes if you're walking from farthest gate to farthest gate.

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Terminals 1-3, are connected and easily accessible from each other. If you… Access 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.

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If you arrive on an international flight (excluding those who have arrived from a preclearance airport), you must clear U.S. Customs and Border Protection (CBP) checkpoints and claim all checked luggage before being allowed to enter the United States, including travelers with connecting flights.

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For domestic flights on different airlines where you have to switch terminals, plan for a minimum one hour connection. For international flights where O'Hare is your first port of entry to the US, two hours is safe.

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This is the O'Hare International Airport terminals map. Terminal 1, the ANA departure terminal, Terminal 2, Terminal 3, and Terminal 5, the ANA arrival terminal, are connected by the Airport Transit System (ATS), a shuttle service between terminals.

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Generally, the first three terminals are considered domestic terminals and are easily traversed. All three of these terminals are connected by pedestrian walkways, making them so much easier to cross than having to wait for transportation to take you to them.

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The project increased the terminal's capacity by 25%, and added nearly 350,000ft² to the existing building. The gates have been designed to accommodate larger and wide-body aircraft.

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Once Terminal 5's construction was done, airport authorities realized it made more sense to service all international flights (arrivals and departures) through the newly constructed terminal. Terminal 4 was no longer in service.

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But Terminal 4 was shut down as soon as it was opened. The International airline companies found the operating area too small, and there were problems coordinating bus traffic through the site, too. Airlines and designers quickly began planning a new international terminal, which opened as Terminal 5 in 1993.

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If your itinerary was purchased as one ticket (as in: you have only one itinerary and one confirmation number), and the connection time was too short and you miss the second (or third) flight, you can rest easy, no matter what happens. The airline will simply put you onto the next available flight, free of charge.

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Overall, passengers usually have to re-clear security for connecting flights, though there may be some exceptions depending on the airport and flight itinerary. To make this process easier, checking with the airline or airport ahead of time is recommended.

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You'll need to clear customs and immigration. Next, you'll recheck your luggage for the domestic flight. Finally, you'll need to go through Transportation Security Administration screening. This may include a physical inspection of your luggage and personal items with a metal detector or a full-body scan.

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If you checked a bag, you'll have to collect it from baggage claim from the international flight. You'll need to clear customs and immigration.

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Terminal 1 / Concourse C
  • All Nippon Airways.
  • United Airlines.
  • United Express (ExpressJet)
  • United Express (GoJet Airlines)
  • United Express (Mesa Airlines)
  • United Express (Shuttle America)
  • United Express (SkyWest Airlines)
  • United Express (Trans States Airlines)


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It's a long walk from F to C, including having to take the underground walkway between B and C (with escalators down and up), I'd say 15-20 minutes. But there is a shuttle bus from E to C, which could save a few minutes.

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