OK, now -- When you want to know something, go to them what knows : Called my American Automobile Association (AAA) and got this answer:
"The mileage between Montreal and Hampton, NH, is 321 miles and it will take approximately 5.8 hours to travel going 55 mph. We just thought you would like to know that on our internet site (www.aaanne.com) you are able to look
up mileage. It is a relatively new option."

So off I went to that site and when I asked it said :
"Mileage from Montreal, PQ to New York City, NY:366 miles
(589 km.)"
Just 45 miles difference! I give up! {cross eyed emoticon}
Madness!
wow