Do I have to go through security again for connecting flight domestic to international?

For connecting domestic flights, you almost never have to exit and reenter security, though there are some exceptions at airports where the terminals aren't all connected. For domestic-to-international connection, it's still pretty rare that you have to exit and reenter security, even if you're changing terminals.



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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 journey is two or more flights with the same airline on the same ticket, and the first flight is domestic and the second international, then in general, yes, you can check in for both flights at the first airport even if it is domestic.

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You will need to reclear TSA security once you arrive in your departure terminal. For international arriving passengers, you must claim all checked bags at Customs and recheck with your departing airline, even if the bags are checked to your final destination!

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Please note connecting passengers exit into the airport's public area and are required to clear security prior to boarding their next flight.

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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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In cases where the connecting flight is one another airline or another terminal, passengers must go through a security and baggage check once again before you get on board the connecting flight to reach your destination.

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If you're flying internationally, you may need to go through a second security screening before your flight: immigration. All you'll need to do here is show your passport and follow the instructions from the immigration staff. This is the last step before you can walk to your gate for your flight.

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Minimum connection times at the John F Kennedy Airport in New York can be as low as 30 minutes for domestic flights (if you're flying the same airline). However, it can take as long as 3 hours if you're coming off an international flight and you need to do a terminal change in order to make your connection.

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Is 1 hour enough layover time in JFK? Not if you have a connecting flight to catch. Especially if the connecting flight is from a different terminal. Make sure you have enough time if you have a connecting flight from JFK.

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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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If your flights were booked under one ticket, your bags will be checked through to your final destination. If your flights were booked under separate tickets, you will need to collect your bags and recheck them before your connecting flight.

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Most (but again, not all) airports connect international terminals airside. When you're connecting from an international flight to a domestic one, you'll always have to exit and reenter security as you'll need to go through customs and immigration (unless you have gone through preclearance aboard, which is rare).

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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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Two to three hours is the minimum recommended time for an international layover, but more might be needed.

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If you miss your connection booked with the same airline that your were on for your first flight, and the issue is due to a delayed take off or anything else that's in the hands of your airline, it's the airline's responsibility to rebook you on the next available flight.

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For international layover flights booked on one airline, two hours is often recommended to make your connection. For international flights on different airlines, the connection time will need to be even greater as you may have to change terminals between the two flights.

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To put it simply, having a connecting flight means you will have to change planes. You will not be flying directly from A to B, but there will also be C. You will fly from A to C, and then from C to B. Sometimes there will be more than a single stop.

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International Connections
If your connecting flight is in Terminals 1, 2 or 3, you can take the free, 24-hour Airport Transit System (ATS). All connecting passengers must go through Transportation Security Administration (TSA) security screening.

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Security processing times. At airports in the U.S., travelers may experience longer lines at Transportation Security Administration (TSA) checkpoints. The TSA advises arriving at the airport two hours before your flight for domestic travel and three hours before for international travel.

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