Is one hour enough for a connecting international flight in Atlanta?

One hour is VERY TIGHT for a domestic to international connection (it's even tight for domestic to domestic, but much less risky).



In 2026, one hour is extremely risky and generally not recommended for an international-to-domestic or international-to-international connection in Atlanta (ATL). Even though Atlanta is a highly efficient hub, you must clear U.S. Customs and Border Protection (CBP), collect your checked luggage, re-check it, and clear TSA security again if you are arriving from abroad. This process rarely takes less than 45–60 minutes, even with Global Entry. If you are connecting from a domestic flight to an international flight, one hour is physically possible since you don't have to clear customs, but any slight delay in your first flight's landing or a gate change between the far-flung concourses (T, A, B, C, D, E, and F) could cause you to miss your boarding window. For a stress-free experience at the world's busiest airport, a minimum of 2.5 to 3 hours for international connections is the standard 2026 recommendation.

People Also Ask

Atlanta has a domestic and international terminal with concourses A to F and T. To help you make your connection, once you arrive you will need to clear immigration, collect your bags, check in with the next airline, clear security and head back to the departure area.

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Flight Connections at ATL
Regardless of where you are traveling to or from, all passengers must pass through Passport Control upon arrival at ATL, and this will be processed within the concourse that you arrive at. All passengers also have to proceed to the baggage claim area to pass through customs.

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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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What is a good connection time? Travel advisers say there's a lot to take into account when booking connecting flights, but a general rule of thumb is 60-90 minutes between domestic flights and at least two to three hours for international itineraries.

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Do you have to go through security again for connecting flight? Yes, passengers usually have to re-clear security for connecting flights. It is recommended that travelers allow enough extra time before their connecting flight to pass through security and customs again.

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Recommended minimum connection times
Delta: 30-minute minimum connection time. Southwest: At least 30 minutes if you have checked bags. United: 30-minute minimum for domestic, 60 minutes for international.

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Domestic flight - international flight: 40 minutes Exceptions: If your inbound flight is on a 330 or 767, then the minimum connection time is 50 minutes for a domestic-international connection. The minimum domestic-YYC connection time is 45 minutes. The minimum domestic-HAV connection time is 55 minutes.

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Delta Air Lines operates both in Terminal S - Domestic (South) and in Terminal I - Maynard International Terminal.

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You do not go through customs departing the US. On your return, I would count on it taking 2 hours if you do not have Global Entry or even Mobile Passport. We usually recommend 3 hours for such a connection. It might be shorter, but that builds in a pad for delays or unusually long lines.

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7) CONNECTING FLIGHTS. After exiting security, you're free to proceed to the gate for your connecting flight. If traffic is not high, this process usually takes about 30-45 minutes (less if you didn't check bags), but it can take longer at peak times and if you are not a citizen/resident.

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What is a good connection time? Travel advisers say there's a lot to take into account when booking connecting flights, but a general rule of thumb is 60-90 minutes between domestic flights and at least two to three hours for international itineraries.

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The bus ride between the terminals takes about 15 minutes. In addition, the International Terminal Connector provides service between the International Terminal and the Car Rental Center and runs approximately every 15 minutes.

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Yes, Delta Airlines aims to accommodate connecting passengers whenever possible. They understand travel schedules can be tight. However, planes might wait briefly if the connecting flight has a reasonable number of passengers on the way.

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1) Use the Mobile Passport App
It's so easy to use and the Mobile Passport line at customs is often nonexistent. This is one of the quickest options to get through customs, sometimes even faster than global entry. Available on the App Store, for US and Canadian citizens, and it's free!

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We will rebook you on the next available flight on Delta at no additional cost. If a Delta flight is unavailable, we will arrange an alternative flight operated by another airline with which we have a ticketing agreement at no additional cost.

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Travelers will claim and bring their luggage with them through U.S. Customs then stay to the right to recheck with their airlines. All connecting passengers must go through U.S.'s Transportation Security Administration (TSA) security screening.

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If a delay in your first flight is the reason you're missing your connection, don't worry too much. Usually, most airlines will rebook you on the next flight, and that too for free. Although, you might have to fly on standby depending on seat availability.

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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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