If you are coming from NY or CT traveling to Montreal, Lacolle Border Crossing is your best bet mileage wise, having said that, it is always a crap shoot once you arrive at the border as to how long the queue is. The earlier in the day you arrive the better, between 8 to 9:30am seems to be best. For many, an overnight in Plattsburgh works nicely as the border is 15 mins from there and Montreal another 50 minutes.An overnight gives you almost a full day in Montreal. When leaving Canada don't forget to stop at the Duty Free Shop, often there are promotions on beer, wine, spirits, colognes and perfumes.