Originally Posted by MSPeconomist (Post 29284138)

I'm confused by your reference to a customs checkpoint exiting baggage claim. The OP will be arriving from Canada and almost all Canada to USA transborder flights do CBP PRECLEARANCE just after checking in on the Canadian flight, before being permitted to board the flight to the USA. At that point, USA CBP officers will see the OP's luggage, checked and cabin stuff (although it's likely to just be a picture of the checked bag which the passenger identifies as part of the procedure). Then, upon arrival in the USA, everything is like a simple domestic flight, with no customs control after baggage claim as the bags will arrive onto a belt with other domestic flights.

Originally Posted by OSSYULYYZ (Post 29299304)

Unless preclearance gets revoked. Preclearance only clears you to land at that specific airport w/o going through customs apparently...not entry to the US officially...

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A preclearance inspection is essentially the same inspection an individual would undergo at a U.S. port of entry and preclearance travelers do not have to undergo a second CBP inspection upon arrival in the United States;

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Originally Posted by TWA884 (Post 29299600)

The highlighted sentence is incorrect.

One undergoes both customs and immigration inspections at airports with preclearance facilities. Flights from those airports then arrive at the US just as domestic flights do.