Statistics Canada says there were nearly two million overnight trips to the United States, the highest level since record-keeping began 40 years ago.
There were also 2.7 million same-day car trips to the United States.
In total, there were 4.7 million trips to the United States from Canada, an increase of 1.8 per cent.
In the opposite direction, travel to Canada from the United States rose 1.7 per cent to 1.7 million trips.
Canadian travel to overseas countries remained unchanged from November at 808,000 trips.
Travel to Canada from overseas countries increased 0.8 per cent from November to 393,000 trips.
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