Flying from IAD→YTZ→YHZ—where do I clear Canadian customs?

I've flown into Canada at YYZ quite a bit in the past, and normally go through Canadian customs there after exiting the plane. Easy-peasy. All the times I've flown into Canada from the US have been directly to my final destination, which is also a port of entry.

But this time, I'm planning a trip that will take me through YTZ (Billy Bishop) instead, with a connecting flight to Halifax (YHZ). Will I be able to clear customs at YTZ or will I do that at YHZ?

The flights I'm looking at have a relatively short layover time, so I'm a little concerned about being able to make the connection if I have to go through customs first.

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Do you go through customs before or after flight to Canada?

If your flight originated in Canada and you have a boarding pass for a connecting flight to a U.S. destination, you must follow the U.S. Connections signs, go through pre-boarding screening checkpoint \u201cC\u201d, and then go through U.S. Customs.

Do you go through customs flying to Canada?

Entering Canada. After arriving at YYC, you will be need to process through Canada Customs before being granted entry into Canada. To speed up your customs processing, download the CanBorder e-Declaration App and save time at the border.

Do you clear customs in Canada?

Travelers pre-cleared at one of CBP's preclearance locations in Canada or the Caribbean are not required to clear CBP again when they arrive in the United States.

How long does it take to get through customs at the Canadian border?

Generally, customs officers will visit multiple sites during the day and process their releases in the afternoon. The process can take anywhere from 12-48 hours and even longer during high traffic periods.

Flying from Washington, DC (IAD / Dulles), 🇺🇸 to Frankfurt (FRA), 🇩🇪 | July 2021

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Meruyert Gonullu, Julia Volk, Olga Lioncat, Meruyert Gonullu