How far is it from Thorold, ON, to St. Clair, ON, ?

The distance between Thorold, ON, and St. Clair, ON, is 309 km by road.

How long does it take to drive from Thorold, ON, to St. Clair, ON, ?

The drive from Thorold, ON, to St. Clair, ON, takes approximately 3 h 50 min by car.

The fastest route from Thorold, ON, to St. Clair, ON, covers 309 km with a driving time of approximately 3 h 50 min.

St. Clair, ON lies roughly to the west of Thorold, ON.

The drive from Thorold, ON to St. Clair, ON mainly follows 403, 401, 402. The longest single stretch is 87 km on 402.

Towns on the route from Thorold, ON to St. Clair, ON include St. Catharines, Burlington, Hamilton, London, Strathroy-Caradoc.

Distance: 309 kmDuration: 3 h 50 min

Driving from Thorold, ON to St. Clair, ON takes about 3 h 50 min via 402. The distance is 309 km. The straight-line distance is 260 km. Driving directions

Driving directions24 · 309 km

The return trip from St. Clair, ON to Thorold, ON covers roughly the same distance, 309 km.

No notable attractions were found along this route.

Popular destinations close by

Distance and drive time are computed from OpenStreetMap road data with the OSRM routing engine. Updated October 2, 2026.

How far is it from Thorold, ON, {fromState} to St. Clair, ON, {toState}?: The distance between Thorold, ON, {fromState} and St. Clair, ON, {toState} is 309 km by road.
How long does it take to drive from Thorold, ON, {fromState} to St. Clair, ON, {toState}?: The drive from Thorold, ON, {fromState} to St. Clair, ON, {toState} takes approximately 3 h 50 min by car.
What is the best route from Thorold, ON, {fromState} to St. Clair, ON, {toState}?: The fastest route from Thorold, ON, {fromState} to St. Clair, ON, {toState} covers 309 km with a driving time of approximately 3 h 50 min.
Which direction is St. Clair, ON from Thorold, ON?: St. Clair, ON lies roughly to the west of Thorold, ON.
Which roads does the route from Thorold, ON to St. Clair, ON follow?: The drive from Thorold, ON to St. Clair, ON mainly follows 403, 401, 402. The longest single stretch is 87 km on 402.
Which towns do you pass between Thorold, ON and St. Clair, ON?: Towns on the route from Thorold, ON to St. Clair, ON include St. Catharines, Burlington, Hamilton, London, Strathroy-Caradoc.