US border preclearance lets you clear US immigration, customs, and agriculture inspections at a foreign airport before you board, so your flight lands in the United States as a domestic arrival. The program runs at 16 airports in six countries, staffed by more than 600 CBP officers and agriculture specialists.1U.S. Customs and Border Protection. Preclearance Once you’re cleared, you step off the plane at a domestic terminal and walk straight to baggage claim or your connecting gate. No CBP line. No TSA rescreening.
Where Preclearance Is Available
Sixteen airports across six countries currently offer CBP preclearance:1U.S. Customs and Border Protection. Preclearance
- Canada (10): Calgary, Edmonton, Halifax, Montreal, Ottawa, Toronto Pearson, Billy Bishop Toronto, Vancouver, Victoria, and Winnipeg
- Ireland (2): Dublin and Shannon
- Caribbean (3): Nassau (Bahamas), Aruba, and Bermuda
- United Arab Emirates (1): Abu Dhabi
The list of designated preclearance stations is set in federal regulation.2eCFR. 19 CFR 101.5 – CBP Preclearance Offices in Foreign Countries If your departure airport isn’t on it, you’ll go through the standard CBP inspection when you land in the United States instead.
How Early to Arrive and What to Bring
Preclearance adds time to your departure. You go through the host country’s regular airport security, then enter the preclearance zone for a separate CBP inspection before reaching your gate. Airlines at preclearance airports often recommend arriving at least three hours before departure, and morning peaks can be tight.
What you need in hand depends on your nationality and reason for travel:
- Passport. Required for everyone. Check the expiration date early; some situations require at least six months of remaining validity.
- ESTA. Citizens of Visa Waiver Program countries must have an approved Electronic System for Travel Authorization before boarding a US-bound flight.3U.S. Customs and Border Protection. Frequently Asked Questions About the Visa Waiver Program and the Electronic System for Travel Authorization
- Visa. Travelers who don’t qualify for the Visa Waiver Program need a valid nonimmigrant visa, such as a B-1 for business or B-2 for tourism.4U.S. Department of State. Visitor Visa
- Customs declaration. You must declare agricultural products, currency over $10,000, and anything restricted that you’re bringing into the country.
Mobile Passport Control
The free Mobile Passport Control app lets you submit your travel details and customs declaration on your phone before you reach the officer.5U.S. Customs and Border Protection. Mobile Passport Control It’s available at 14 of the 16 preclearance airports, everywhere except Billy Bishop Toronto and Victoria. The face-to-face portion moves faster because the officer already has your answers.
What the Inspection Looks Like
Once inside the preclearance area, the experience mirrors what you’d go through at a US port of entry. Federal regulation gives these inspections the same legal effect as if they were conducted at your destination airport.6eCFR. 8 CFR 235.5 – Preinspection
CBP uses facial comparison technology to match you against the photo in your travel document, and officers may collect fingerprints.7U.S. Customs and Border Protection. Biometrics Overview Your biometric data is checked against federal databases for warrants, immigration violations, and security alerts. The officer then asks brief questions about the purpose of your trip, how long you’re staying, and where.
The officer reviews your customs declaration during the interview. If you’re carrying more than $10,000 in currency or monetary instruments, you must report it on FinCEN Form 105. “Monetary instruments” is broader than cash: traveler’s checks, bearer bonds, and money orders in bearer form all count toward the $10,000 threshold.8Office of the Law Revision Counsel. 31 USC 5316 – Reports on Exporting and Importing Monetary Instruments Agricultural declarations get checked here too.
Officers can inspect your carry-on and ask about specific items. Failing to declare prohibited agricultural products can bring a civil penalty from $300 to $1,000, plus seizure.9U.S. Customs and Border Protection. CBP Agriculture Specialists Issue $300 Penalty for Prohibited Items The penalty applies to honest mistakes. An apple you forgot in your bag still counts.
Duty-Free, Alcohol, and What You Can Bring
Your duty-free exemption depends on where you traveled and for how long:
- $800. The standard exemption for most countries, including every current preclearance location. You must have been outside the US for at least 48 hours and not used the exemption in the past 30 days.10U.S. Customs and Border Protection. Types of Exemptions
- $1,600. Available if you’re returning from a US insular possession such as the US Virgin Islands, American Samoa, or Guam.
- $200. The fallback when you don’t qualify for the higher amounts, for example if you were abroad less than 48 hours or already used your exemption in the past 30 days.11U.S. Customs and Border Protection. Duty-Free Exemption
Items must be in your possession, for personal use or as gifts, and declared. Goods shipped separately generally don’t count toward the exemption.
You can include one liter of alcohol if you’re at least 21 and it’s for personal use. Tobacco is limited to 200 cigarettes and 100 cigars from most countries.12U.S. Customs and Border Protection. Customs Duty Information Alcohol and tobacco over these limits are taxed even if you haven’t hit your total dollar exemption.
Agricultural items get the closest look because the goal is to keep foreign pests and diseases out of the US food supply. Meats, fresh fruits and vegetables, plants, seeds, and soil are commonly prohibited or restricted.13U.S. Customs and Border Protection. Bringing Food Into the U.S. When in doubt, declare it. Officers won’t penalize you for declaring something that turns out to be allowed.
Bring prescription medications in their original labeled containers, with a prescription or doctor’s note in English. A practical limit is a 90-day supply for personal use. Controlled substances like stimulants, tranquilizers, and certain cough medicines require a prescription from a doctor confirming the medication is necessary and used under medical supervision.14U.S. Customs and Border Protection. Traveling With Medication to the United States
Global Entry, NEXUS, and TSA PreCheck
Global Entry members can use dedicated kiosks at preclearance airports instead of the regular line. You scan your passport or permanent resident card, provide fingerprints, and answer the customs questions on screen, then hand the receipt to a CBP officer on the way out.15U.S. Customs and Border Protection. Global Entry Now Available at Pre-Clearance Airports NEXUS members, common among travelers using Canadian preclearance airports, have Global Entry benefits built in and can use either kiosk.
TSA PreCheck benefits carry over to any domestic connecting flight after you arrive in the United States.16Transportation Security Administration. Can I Use TSA PreCheck When Flying From a U.S. Airport to a Foreign Country Because precleared flights skip TSA on arrival, PreCheck matters mostly when a connection puts you through a security checkpoint for a different terminal.
Secondary Inspection and Denials of Entry
A CBP officer at a preclearance facility has the same authority to find you inadmissible as an officer at a US airport, and a denial carries the same legal weight. If you’re turned away, you cannot board. A formal inadmissibility finding can affect future travel to the United States and may require a waiver before you can apply again.
In some cases, the officer may allow you to withdraw your application for admission instead of issuing a formal denial. This is entirely at the officer’s discretion; there is no right to withdraw.17eCFR. 8 CFR 1235.4 – Withdrawal of Application for Admission Withdrawal is generally permitted only when the traveler intends and is able to leave immediately. The practical advantage matters: a withdrawal avoids a formal inadmissibility record that would otherwise complicate future entries. If an inspection is going badly, staying calm and cooperative gives you the best chance the officer will offer that option.
Secondary inspection, a more thorough examination in a separate area, is common and doesn’t necessarily mean you’ll be denied. Officers refer travelers to secondary for extra document review, more detailed questioning, or random checks. CBP notes that referrals can happen for reasons unrelated to your personal record, including travel patterns or random selection.18U.S. Customs and Border Protection. Frequently Stopped for Questioning and Inspection When Clearing U.S. Customs and Border Protection Being sent to secondary at preclearance is far less disruptive than being sent there after a long flight.
Arriving in the United States
Precleared flights arrive at domestic terminals. You get off the plane and head to baggage claim or your connecting gate exactly as you would after a flight from another US city. No CBP line, no customs hall, no TSA rescreening.1U.S. Customs and Border Protection. Preclearance Checked bags come off the standard carousel.
CBP does retain authority to conduct additional inspections after you land. Officers may question travelers in the terminal or run spot checks if concerns arose during or after the flight. This is rare, but initial clearance abroad does not permanently close the door to further screening.18U.S. Customs and Border Protection. Frequently Stopped for Questioning and Inspection When Clearing U.S. Customs and Border Protection TSA can also rescreen passengers if the host airport falls short of its agreed security standards.19Congress.gov. Preclearance Authorization Act of 2015 For most travelers, arrival means walking off the plane and straight out of the airport.