Do I have to go through airport security twice?

For most domestic layovers, you won't have to go through security again. However, some airports have separate security checkpoints for each terminal, so if you land in one terminal and your next flight is in another, you would have to go through security again.



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Secondary Security Screening Selection, or SSSS, is a designation by the Transportation Security Administration (TSA) that flags passengers for extra security screening. SSSS can happen on any flight to, from, or within the U.S., including inbound international flights.

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When you have a connecting flight, you usually have to go through security again because you are entering a new area of the airport that may have different security measures. Each airport has its own security protocols and checkpoints, and these may vary depending on the destination, airline, and type of flight.

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In Standard Screening Lane
  • Remove the 3-1-1 liquids bag and place it in the bin.
  • Ensure pockets are empty (keys, tissues, currency, wallets, cell phones, etc.) and remove bulky jewelry (valuable items can be placed in carry-on).
  • Remove your shoes and place them directly on the X-ray belt.


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Do You Need to Go to Check-in Desk if You Have Already Checked In for Your Flight Online? In most cases, you don't have to do that. If you have already checked in for your flight online or through an app, and you don't have checked luggage, you will not need to visit the check-in desk.

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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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While these terms are often used interchangeably, they are not the same thing. A layover is the time you spend at the airport between two flights. A connecting flight is the next flight in your itinerary that you're waiting at the airport to take.

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Immigration Inspection At A U.S. Port of Entry: What Do CBP Officials Do? At each U.S. port of entry, CBP officers review the passports, visas and other supporting documents of every foreign national arriving in the U.S.

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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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Solid food items (not liquids or gels) can be transported in either your carry-on or checked bags within the continental United States. Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible.

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Check your pockets for spare change, keys, etc. If the airport is using full-body scanners you need to have nothing at all in your pockets so I just routinely do that. By the time you get to the security personnel, the only thing you will have out will be your passport or id card and your boarding pass.

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What if you still can't catch your flight? Depending on the airline, travelers may be charged a rebooking fee to get on another flight. Some airlines may also charge the difference in airfare — meaning a missed flight can be a costly inconvenience.

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