Who has to go through customs?

Everyone arriving at a port of entry to the U.S. is subject to inspection by Customs and Border Protection officers for compliance with immigration, customs and agriculture regulations.



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Everyone arriving at a port of entry to the U.S. is subject to inspection by Customs and Border Protection officers for compliance with immigration, customs and agriculture regulations. The more international travelers know about what to expect, the easier and quicker the process becomes.

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The US has preclearance facilities in six countries
  • Ireland: Dublin Airport (DUB) and Shannon Airport (SNN)
  • Aruba: Queen Beatrix International Airport (AUA)
  • Bermuda: L.F. Wade International Airport (BDA)
  • Bahamas: Lynden Pindling International Airport (NAS)
  • United Arab Emirates: Abu Dhabi International Airport (AUH)


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For international layover flights, you will normally have to go through customs and immigration at the connecting airport. For flights with a layover in Canada or the USA, you will need to go through immigration and fill out the necessary customs paperwork even if you are not staying in the country.

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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 most cases, passengers on layover flights must clear customs and immigration at the first point of entry. If you want to simplify the process, consider applying for Global Entry.

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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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How long does custom clearance take? Typically, customs clearance takes less than 24 hours, however, there are times where it can take several days or weeks for goods to be inspected. When is customs clearance needed? Customs clearance is necessary for all packages entering the U.S. from other countries.

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What Do I Have to Declare at U.S. Customs?
  • Plants, seeds, food, fruit, vegetables, insects.
  • Meat, animals or animal products.
  • Disease agents, cell cultures, snails.
  • Soil, or if you have been on a farm, ranch, or pasture.


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Usually, you go through customs when you exit the airport at your final destination. However, if you have a layover in a different city in your destination country, you may need to go through customs before your connecting flight.

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CBP enrolls in-scope non-U.S. citizen travelers in the DHS Biometric Identity Management System (IDENT) as a biometric confirmation of arrival. Our traveler identity verification process is not a surveillance program.

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The General Guideline for How Early You Should Get to the Airport. Generally speaking, most airlines advise that you arrive at the airport at least 2 hours prior to a domestic flight, and at least 3 hours prior to an international flight.

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Do You Have To Go Through Customs During A Layover? 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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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 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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Do You Have To Go Through Customs During A Layover? 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.

MORE DETAILS