How long is the drive?

Approximately 7 hours of driving time.

Is Sarnia near the border?

Yes, it is located directly across from Port Huron, Michigan.

What is the best route?

Highway 401 West to Highway 402 West.

VIA Rail serves Sarnia, but you must reach a station like Brockville first.

Is it a scenic drive?

The final stretch near Lake Huron is quite scenic.

Athens

Sarnia

Driving

Athens to Sarnia

Updated: 28 May 2026

The route from Athens to Sarnia is one of the longest internal Ontario drives, covering roughly 650 kilometers. You will follow Highway 401 West for the vast majority of the trip, eventually transitioning to Highway 402 near London. Expect a travel time of approximately 7 hours, excluding stops. This journey takes you from the St. Lawrence River region to the shores of Lake Huron. Proper planning is essential for such a long transit.

Total Distance: 650 km driving distance; 580 km straight-line air distance.

Fastest Way

Driving via Highway 401 and 402 is the fastest, taking 7 hours.

Cheapest Way

Driving is the most practical and cost-effective way to reach Sarnia from Athens.

Compare Athens to Sarnia Routes

Driving

Direct

Duration

7 hours

Avg Price

$100-$120 in fuel

Operator

Personal Vehicle

Route

County Rd 5 to Highway 401 West, then Highway 402 West.

The stretch on Highway 402 is often quieter than the 401, allowing for smoother driving.

Travel Tips

Plan Stops
Schedule a major break in London to stretch your legs halfway through.
Traffic Awareness
The 401 through Toronto is the biggest bottleneck; plan to pass it outside peak hours.
Fuel Strategy
Fill up in smaller towns before hitting the major highway corridors to save money.
Weather Check
Lake Huron can cause sudden weather changes; check the forecast before leaving.
Vehicle Prep
Check your coolant and oil levels, as this is a high-mileage day.

Safety Tips

Highway Vigilance
Stay in the right lane except when passing on the 401.
Driver Fatigue
If you feel tired, stop at a service center for a coffee and a walk.
Emergency Supplies
Keep a first aid kit and extra water in your vehicle.
Road Conditions
Check the Ontario 511 map for any lane closures or construction.