A little over an hour by car through Cornwall, ON. 75 miles by road. Depending on the wait time at the border, it can take hours cause of the paranoid America we live in today.
3031 miles
The distance between Ottawa, ON, Canada, and Watertown, NY, USA is 206km and will take about 2 Hours 15 Minutes to drive.
Um, that's what Mapquest is for.
The nearest U.S. border crossing at Prescott, Ontario/Ogdensburg NY. Or at Cornwall - Massena or St. Regis, NY.
100520 miles
It is 251 miles according to Google Maps.
It is 219 miles according to Google Maps.
It is 254 miles according to Google Maps.
329 miles
Massena NY
About 400 kilometers or 250 miles (just under 5 hours by car)
The driving distance from Ottawa, Canada to Ogdensburg, New York is 61 miles / 98 km