Ottawa, Ontario, Canada to Sarnia: Road Trip Guide & Distance

How far is Ottawa, Ontario, Canada from Sarnia?

The distance from Ottawa, Ontario, Canada to Sarnia is 372.4 miles (599.4 km) as the crow flies. Sarnia is located WSW of Ottawa, Ontario, Canada. By car, the driving distance is approximately 451.9 miles, taking about 8h 47min. A direct flight would take roughly 1h 15min. Both are located in Canada.

This is a solid day of driving. Be sure to take breaks every 2-3 hours to avoid driver fatigue, and plan your meals ahead of time. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare.

Coordinates come from public place data for Ottawa, Ontario, Canada and Sarnia. The driving distance uses an OSRM road-route result when route data is available. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.