How far is it from Cornwall, ON, to Deep River, ON, ?

The distance between Cornwall, ON, and Deep River, ON, is 294 km by road.

How long does it take to drive from Cornwall, ON, to Deep River, ON, ?

The drive from Cornwall, ON, to Deep River, ON, takes approximately 4 h by car.

The fastest route from Cornwall, ON, to Deep River, ON, covers 294 km with a driving time of approximately 4 h.

Deep River, ON lies roughly to the north-west of Cornwall, ON.

The drive from Cornwall, ON to Deep River, ON mainly follows 138, 417, 17. The longest single stretch is 134 km on 417.

Towns on the route from Cornwall, ON to Deep River, ON include South Stormont, Ottawa, Mississippi Mills, Arnprior, Petawawa.

Distance: 294 kmDuration: 4 h

Driving from Cornwall, ON to Deep River, ON takes about 4 h via 417. The distance is 294 km. The straight-line distance is 246 km. EV charging is available along the route, including in Cornwall, ON. Driving directions

Driving directions12 · 294 km

The return trip from Deep River, ON to Cornwall, ON covers roughly the same distance, 294 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 5, 2026.

How far is it from Cornwall, ON, {fromState} to Deep River, ON, {toState}?: The distance between Cornwall, ON, {fromState} and Deep River, ON, {toState} is 294 km by road.
How long does it take to drive from Cornwall, ON, {fromState} to Deep River, ON, {toState}?: The drive from Cornwall, ON, {fromState} to Deep River, ON, {toState} takes approximately 4 h by car.
What is the best route from Cornwall, ON, {fromState} to Deep River, ON, {toState}?: The fastest route from Cornwall, ON, {fromState} to Deep River, ON, {toState} covers 294 km with a driving time of approximately 4 h.
Which direction is Deep River, ON from Cornwall, ON?: Deep River, ON lies roughly to the north-west of Cornwall, ON.
Which roads does the route from Cornwall, ON to Deep River, ON follow?: The drive from Cornwall, ON to Deep River, ON mainly follows 138, 417, 17. The longest single stretch is 134 km on 417.
Which towns do you pass between Cornwall, ON and Deep River, ON?: Towns on the route from Cornwall, ON to Deep River, ON include South Stormont, Ottawa, Mississippi Mills, Arnprior, Petawawa.