Is 1 hour layover enough at O Hare?

In general, that should be fine. My understanding is that the minimum connecting time at O'Hare is 40 minutes, which generally means that the airlines expect to need 40 minutes to allow you enough time to get between flights as well as get your baggage to your next flight.



A 1-hour layover at Chicago O'Hare (ORD) is possible but extremely risky. For a domestic-to-domestic connection where both flights are in the same terminal (like United in Terminal 1 or American in Terminal 3), you can make it if your first flight is perfectly on time. However, O'Hare is massive, and walking between the ends of the concourses can take 15 to 20 minutes alone. If your connection involves Terminal 5 (the international terminal), 1 hour is categorically not enough, as it requires taking the "People Mover" train and clearing security again. In 2026, O'Hare remains one of the most weather-prone airports in the U.S.; a 15-minute delay on your inbound flight can easily cause a missed connection. For peace of mind, a 90-minute to 2-hour window is much safer. If you must book a 1-hour gap, try to sit at the front of the plane and study the terminal map on the airline app before you land.

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What is the recommended layover time for international flights? International flights require longer connections as you will often have to go through immigration and customs upon arrival. For international layover flights booked on one airline, two hours is often recommended to make your connection.

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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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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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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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Two to three hours is the minimum recommended time for an international layover, but more might be needed. Sally French is a travel rewards expert who joined NerdWallet in 2020.

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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 your airline offers the option of automatically transferring your luggage and you have a boarding pass for your connecting flight, you will be asked to proceed via a connecting flights corridor, avoiding Canadian customs. You will, however, have to go through U.S. customs.

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We recommend that you allow the following minimum connection times: 1 hour for connections within the same Heathrow terminal. 1 hour 30 minutes for connections that require travel between terminals at Heathrow.

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No matter what airline you're flying, if you have a connecting flight that arrives in the United States from an international destination, you'll need to pick up your bags and recheck them on your next flight.

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Try to schedule domestic connecting flights with at least 1.5 hours cushion time. For international flights, leave at least 2.5 hours. Planes almost never arrive as scheduled.

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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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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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In a passenger context, MCT is defined as the shortest time interval required in order to transfer a passenger and his luggage from one flight to a connecting flight, in a specific location or metropolitan area.

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It is all about (unsurprisingly) economics. An airplane (which is very expensive) only makes money when it is flying, so airlines have an incentive to get them in the air as quickly as possible.

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Your checked baggage will be delivered to your final destination and will automatically be transferred by Air Canada during each connection, unless advised otherwise at check-in.

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Passengers with a connecting flight, and who have been checked through all the way to their destination, should claim their luggage, then drop it off with an airline attendant at the recheck counters located directly outside of the CBP processing area.

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