There is no direct highway, but you take Kimball south from Sarnia, until you get to St. Clair Rd (40) that should take you to the 401 highway leads to Windsor.
The road mile distance between Sarnia and Windsor is approximately 100 miles.
The driving distance from Sarnia to Windsor is 72.9 road miles.
73 miles
163 miles / 262kmThough driving it is more like 290 km taking this route:Take HIGHWAY 21 - SOUTH, from Goderich, to HIGHWAY 402 - WEST to SARNIA; then get off at the NEXT EXIT, and continue on RR-21 SOUTH to HIGHWAY 401 - WEST to WINDSOR.Take HIGHWAY 401 - WEST to Windsor.
Sarnia is 150KM from Kitchener in terms of distance but more like 190KM by highway. It is a two hour drive
About 1.5 hours assuming the border isn't backed up.
335 kilometres taking this route:Take HIGHWAY 403 WEST from Oakville to HIGHWAY 401 WEST to LONDON at the END of HIGHWAY 403.Take HIGHWAY 401 WEST to Windsor.
There are actually 3 ways to go.If you cut through Michigan it's 67.24 milesIf you go through Chatham it's 98.66 milesIf you go through Kimball it's 97.64 miles
217 miles (350 kilometres) taking this route:Take HIGHWAY 410 SOUTH from Brampton to HIGHWAY 401. Follow signs to HIGHWAY 401 WEST to LONDON.Take HIGHWAY 401 WEST to Windsor.
About 30 minutes it takes to drive from Detroit to Windsor.
The motto of Sarnia is 'Sarnia Semper'.
about 300 km (190 miles) taking this route:Take HIGHWAY 403 - WEST (towards BRANTFORD), from Hamilton, to HIGHWAY 401 - WEST to LONDON.Take HIGHWAY 401 - WEST to Windsor.