Can you go between terminals at SFO without leaving security?

Passengers can connect to certain terminals without exiting and re-entering security. Post-security connectors are available between: International Terminal A Gates (Gates A1 through A15) and Harvey Milk Terminal 1 (Gates B1 through B27)



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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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The answer is YES, in theory. TSA is supposed to allow you access to the checkpoint of any terminal at an airport where you have a valid boarding pass for a departing flight on the same day.

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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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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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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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The short answer is yes. It is possible to exit and reenter the airport. Whether or not you should depends on a range of factors, including if you're traveling internationally or domestically and how much time you have between flights.

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With Global Entry, it takes us from 30-120 mins (most often in range of 45 mins from deplane to exiting Customs) to clear Immigration, retrieve luggage, then Customs. Usually, waiting for luggage is the time-consuming aspect.

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Do flights always leave from same terminal? It depends on the airport and airline. Connecting flights may take off from the same terminal, but often they do not.

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SFO's 24-hour, year-round AirTrain people mover has station departures about every four minutes, and takes about five minutes to travel between each terminal.

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Terminal Loop Shuttle – runs between Terminals 1 and 2 daily from 6 a.m. – 11 p.m. To learn more about where to pick up our Terminal Loop Shuttle, watch our video.

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Why do many major airports have separate terminals for domestic and international flights? International flights require passengers to pass through immigration and customs checks on arrival. Domestic flights do not.

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