Green Bay to Sarnia: Road Trip Guide & Distance

How far is Green Bay from Sarnia?

The distance from Green Bay to Sarnia is 299.7 miles (482.4 km) as the crow flies. Sarnia is located ESE of Green Bay. By car, the driving distance is approximately 374.7 miles, taking about 7h 32min. A direct flight would take roughly 1h 6min. Green Bay is in Wisconsin, United States, while Sarnia is in Ontario, 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. 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.

Coordinates come from public place data for Green Bay 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.