Can you walk between terminal 3 and 5 at O Hare?

While Terminals 1, 2 and 3 have pedestrian connections on the secure side of the airport, Terminal 5 does not. The secure airside bus service dramatically improves convenience for passengers arriving on a flight into Terminals 1, 2, and 3 and connecting to a flight that departs from Terminal 5, or vice versa.



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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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The Airport Transit System (ATS) is a convenient, fast and reliable people mover system at O'Hare International Airport, offering fully-automated service every 3-5 minutes during peak hours, 24 hours a day, seven days a week.

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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 will need to go through passport control (and customs if applicable) and then check in again as normal for your connecting flight, so please ensure you have enough time.

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Everyone who boards an aircraft at Heathrow has to be security screened to UK government standards. Even if you've already been through security checks at another airport, we're obliged to screen you again before you fly from Heathrow.

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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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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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