Detroit to Sarnia: Road Trip Guide & Distance

How far is Detroit from Sarnia?

The distance from Detroit to Sarnia is 55.4 miles (89.1 km) as the crow flies. Sarnia is located NE of Detroit. By car, the driving distance is approximately 72 miles, taking about 1h 27min. A direct flight would take roughly 37min. Detroit is in Michigan, United States, while Sarnia is in Ontario, Canada.

This is a quick and easy drive, perfect for a day trip or weekend getaway. You can easily make the round trip in a single day. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. Keep in mind this route crosses international borders. Don't forget your passport, and check current border crossing times and vehicle insurance requirements. Given the short distance, driving or taking a train is often faster and more convenient than dealing with airport security and flight boarding times.

Coordinates come from public place data for Detroit and Sarnia. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.