Travel outside the country slipped by one per cent to five million trips in January compared with December.
Overall, Canadian residents made 4.2 million trips to the United States in January, a drop of 1.6 per cent, but same-day car trips south fell even more, by four per cent to 2.4 million visits.
Overnight travel to the United States rose 1.8 per cent in January to 1.8 million trips, the highest level recorded since record keeping began in 1972.
Canadian travel overseas rose by 2.4 per cent to 776,000 trips.
In the other direction, travel from abroad to Canada was virtually unchanged at two million trips.
Same-day car travel by Americans decreased 3.8 per cent to 577,000 trips, but this decrease was offset by a 2.2 per cent increase in overnight travel to 985,000 trips.
Residents of countries other than the United States made 389,000 trips to Canada in January, almost the same as in December.