Loss of U.S. pre-clearance could cost Canadian air sector

A decades-old convenience that lets travelers clear U.S. customs before they even leave Canada is suddenly in doubt, and tourism leaders from Banff to Halifax are bracing for turbulence. 

Why the future of U.S. pre-clearance matters to travelers

For travelers using Canadian gateways such as Toronto Pearson or Vancouver International, U.S. pre-clearance feels almost routine: step off a domestic security line, speak with American officers, and land in the United States as if arriving on a domestic flight. The system dates to 1952, when Toronto became the first airport to offer the service. Today, that early pilot has expanded into eight Canadian airports—Calgary, Edmonton, Toronto, Vancouver, Montréal, Halifax, Winnipeg, and Ottawa—forming the backbone of an international network of 15 pre-clearance sites in six countries. According to U.S. Customs and Border Protection (CBP), more than 22 million passengers were processed through the program in 2024, representing nearly 16 percent of all commercial air travelers heading to the United States. Those numbers illustrate why the threat of suspension has rattled airlines, airports, and passengers alike. 

‘We’re not sure we can make the numbers work’

The warning shot came from Pete Hoekstra, the United States ambassador to Canada. “We’re not sure we can make the numbers work anymore … pre-clearance is something that is done at the expense of the U.S. government. We paid for it,” Hoekstra said at the Global Business Forum in Banff. The ambassador noted that departures from Canada to the United States have fallen this year, making the investment look less compelling to Washington. 

What’s behind the dip in demand?

Industry observers point to a mix of lingering post-pandemic travel patterns, a strong U.S. dollar that makes American vacations pricier for Canadians, and competition from new non-stop routes to Europe, Asia, and the Caribbean. Even so, cross-border flying remains a staple of Canada’s two largest airlines. John Gradek, who teaches aviation management at McGill University, said WestJet and Air Canada have long marketed one-stop itineraries that rely on pre-cleared connections. A Californian heading to London might, for instance, fly WestJet to Calgary, breeze through a pre-clearance lane on the way home, and avoid the crowds in Los Angeles. “For passengers arriving in congested airports in congested time frames, it’s a winner,” Gradek told reporters in a telephone interview. 

Potential consequences for airports and airlines

• Gate and counter congestion: Losing the dedicated CBP halls would free real estate but force U.S.-bound travelers back into mixed-use security lines.
• Schedule padding: Airlines would need to add extra time on arrival to account for customs processing stateside, complicating tight banked connections.
• Revenue hits: CBP facilities occupy premium space, yet a reduction in U.S. travel could shrink passenger-generated fees for airports in Edmonton, Halifax, and Winnipeg.
• Competitive disadvantage: European hubs like Dublin, which also house CBP officers, would gain relative appeal for Americans returning home.

WestJet spokesperson Jen Booth responded in an emailed statement, saying the United States “remains a significant market” and that pre-clearance “significantly reduces  congestion at points of entry in the U.S.A.” The airline has not indicated whether it would cut routes if the program were to disappear, but analysts believe that secondary airports would feel the sting first. 

How pre-clearance works today

1. Travelers check in and clear Canadian airport security. 
2. Instead of heading directly to their gate, they enter a U.S. CBP area staffed and funded by the American government. 
3. After completing the usual passport, visa, and agricultural checks, passengers proceed to a sterile departure zone. 
4. Upon landing in the United States, they are treated as domestic arrivals, allowing quicker exits or seamless onward connections. 

The model extends beyond Canada. Ireland, the United Arab Emirates, Bermuda, the Bahama,s and Aruba round out the six-country roster, but Canada contributes the lion’s share of traffic. 

Cost questions on both sides of the border

The United States shoulders staffing costs, while host airports supply the square footage. Gradek argues that any cost-benefit analysis should include tourism spending. Weekend trips to Las Vegas or New York, he said, are often chosen precisely because pre-clearance removes the headache of long queues at major U.S. hubs. Canadian airports agree. Toronto Pearson warned in a background note last year that dismantling CBP zones could force a redesign of its transborder terminal, at an eight-figure cost that would ultimately be passed on to passengers through higher fees. 

What travelers could face if the program ends

• Longer total journey times. On-arrival customs inspections in the United States can add 30–90 minutes, depending on the level of airport congestion.
• Tighter connection buffers. Minimum connection times may increase, which could lead to higher fares as airlines lose optimization flexibility.
• More missed flights. Domestic winter storms in hubs like Chicago or Denver could strand Canadians mid-journey rather than at their home airport.

Tips for Travelers

1. Book through itineraries. If pre-clearance remains, you retain the benefit; if it disappears, a single ticket still protects you in case of missed connections.
2. Buffer your schedule. Add at least two hours for U.S. customs when planning tight meetings or cruise departures.
3. Monitor loyalty alerts. Both WestJet Rewards and Air Canada Aeroplan are expected to push notifications the moment policy shifts.
4. Consider global entry. Frequent travelers might offset longer lines in the United States by enrolling in expedited re-entry programs.

What happens next?

The ambassador’s remarks stop short of a formal policy change, and neither CBP nor Transport Canada has announced negotiations. However, aviation insiders believe the fiscally driven review could begin within months, lining up with the next federal budget cycle in Washington. Gradek notes that previous threats to trim pre-clearance—in 2013, 2017, and 2020—faded once lawmakers calculated downstream impacts on commerce. Still, he cautions that this time the traffic figures are lower, and alternative screening technologies give CBP more options. 

Which Canadian airports offer U.S. pre-clearance today?

Calgary, Edmonton, Toronto, Vancouver, Montréal, Halifax, Winnipeg and Ottawa.

How many global sites exist?

CBP counts 15 locations across six countries.

How many travelers used the service in 2024?

More than 22 million, or nearly 16 percent of all commercial air passengers heading to the United States.

When did the first Canadian site open?

Toronto introduced pre-clearance in 1952.

Is there a timeline for a decision?

No official date has been set; negotiations are likely to unfold over several months.

For now, the best guidance is to keep an eye on your airline’s advisories and be prepared for a possible return to post-landing customs lines. If you rely on the smooth hand-offs offered by pre-clearance—especially at traditionally congested airports in California, New York, or Florida—every flight booked this winter could be subject to change. — as Hoekstra said at the Global Business Forum.