Um, that's what Mapquest is for.
329 miles
The distance between Ottawa, ON, Canada, and Watertown, NY, USA is 206km and will take about 2 Hours 15 Minutes to drive.
100520 miles
It is 251 miles according to Google Maps.
It is 362.58 miles according to MapQuest.
It is 219 miles according to Google Maps.
It is 254 miles according to Google Maps.
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
The closest US state to Ottawa is New York. The distance from Ottawa to the NY state line is about 56.2 miles / 90.5 km.
about 200 miles
The distance from Lancaster, PA to Rochester, NY is approximately 300 miles. It usually takes around 5-6 hours to drive between the two cities, depending on traffic and route taken.