How do I change terminals at Chicago O Hare?

????Airport Transit System ?If connecting between domestic Terminals 1, 2 & 3, you DON'T have to leave the secured side and take the ATS, you can simply follow the overhead signage to guide you between all domestic terminals. ? To get between Terminal 5 and Terminals 1, 2 & 3, take the Airport Transit System? (ATS).



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All connecting passengers must go through Transportation Security Administration (TSA) security screening.

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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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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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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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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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Terminal 5 (international) Terminal 5 contains Concourse M (21 gates) and operates almost all O'Hare's international departures and arrivals (except flights from Air Canada, American and United from airports with U.S. border preclearance).

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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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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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An enclosed walkway connects the Departures Level of Terminal 1 with the Arrivals Level of Terminal 2. Once you pass through security in both terminals, you are within a common departures area, and you can freely walk between the shopping areas and boarding gates across both terminals.

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If you're connecting on the same airline, in the same terminal, then yes, it should be enough time. Check first the airline's and flight's on-time record. If you need to change airlines, and terminals, it could be tight.

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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 pick-up your luggage, then check it in again for the next flight. Top Tip: A wait at the airport between two connecting flights is called a layover. For more travel advice, check out our guide to dealing with a short layover.

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Yes, a security check is mandatory when you take a connecting flight. This is because there is a time lag between getting off one aeroplane and getting on-board another to reach your destination.

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There are many factors that impact how long it may take travelers to complete the immigration and CBP process, but it is rare for it to take more than two hours. Passengers connecting to another location must recheck their luggage.

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Customs and immigration are usually required at the connecting airport for international flights. You don't always have to for domestic flights. In most cases, passengers on layover flights must clear customs and immigration at the first point of entry.

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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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