None. They're contiguous.
It is 321 kilometers according to Google Maps.
It is 272 via Cleveland, Toledo and Detroit.
Windsor is on the border between Ontario and Michigan. Its directly across from Detroit, Michigan.
4 h 48 min (519.7 km) via ON-401
Windsor, Ontario, across the Detroit River in southernmost Canada, between Lake St. Clair and Lake Erie.
Windsor is directly across the Detroit River from Detroit. A tunnel between the two is a little less than a mile long.
The distance between Petrolia, Ontario and Windsor, Ontario is about 86.7 road miles or 140 km.
760 km http://www.theweathernetwork.com/index.php?product=travellers&pagecontent=CAON0512
229 miles
The distance between Windsor, Ontario and Chatham, Ontario is 82.9 km. Depending on traffic conditions, the average time of this journey by road is 1 hour.
The distance between Windsor (Ontario) and Calgary (Alberta) is 3,167 km (about 1 day 7 hours).
The distance between Windsor Ontario and Mississauga Ontario is 354km and will take about 3 hours 42 Minutes to drive.