What Is US Customs Preclearance, and Which Airports Have It?
If you've ever sprinted through a US airport trying to make a connecting flight because customs took forever, you know exactly the kind of stress I'm talking about. There's a way to avoid it entirely, and it's called preclearance.
Preclearance means you go through the US customs process before you depart the foreign country, not when you arrive in the US. It's a huge time saver. You're already arriving early to the airport before your flight anyway, so preclearance simply fills that waiting time productively. And once you land back in the US, you walk off the plane and go straight to your next gate or your final destination, just like you would on a domestic flight. No customs lines, no TSA lines, no tight connections turning into a full sprint through the terminal.
We experienced this firsthand in Aruba, and it was such an easy process. There are a lot of winding lanes to work through, but it made re-entry into the US feel effortless, exactly like we had landed from a domestic destination rather than an international one.
I can't tell you how many flights I've personally missed, or barely made by running, because US customs took too long to process on arrival. Preclearance solves that problem entirely.
Frequently Asked Questions
What is US Customs and Border Protection (CBP) Preclearance?
Preclearance is the strategic stationing of CBP personnel at designated foreign airports to inspect travelers before they board US-bound flights. With preclearance, travelers bypass CBP and TSA inspections upon arrival in the US and go directly to their connecting flight or final destination.
Which airports have US customs preclearance?
Preclearance currently operates at 16 locations across 6 countries:
Ireland: Dublin and Shannon
Aruba: Queen Beatrix International Airport
Bermuda: L.F. Wade International Airport
United Arab Emirates: Abu Dhabi International Airport
Bahamas: Nassau (Lynden Pindling International Airport)
Canada: Calgary, Toronto (Lester B. Pearson International Airport), Billy Bishop Toronto, Edmonton, Halifax (Robert L. Stanfield International), Montreal (Trudeau International Airport), Ottawa (MacDonald-Cartier International Airport), Vancouver, Victoria, and Winnipeg
What are the benefits of flying through a preclearance airport?
The two biggest benefits are no security or waiting upon US arrival, since travelers skip CBP and TSA inspection lines and go straight to their connecting flight or destination, and easier domestic connections, since preclearance makes tighter connection windows at US airports far less risky and reduces the chance of missing a domestic flight.
How many travelers use preclearance each year?
In 2025, CBP personnel stationed abroad precleared more than 22 million travelers, representing nearly 14.6 percent of all commercial air travelers to the United States. More than 600 CBP officers and agriculture specialists are stationed across the 16 preclearance locations.
Does preclearance make US arrival feel like a domestic flight?
Yes. Once you've gone through preclearance abroad, landing back in the US feels just like landing from a domestic flight. There's no additional customs or immigration processing required on arrival, so you can head straight to baggage claim, a connecting gate, or your final destination.