Philadelphia to Sarnia: Road Trip Guide & Distance

How far is Philadelphia from Sarnia?

The distance from Philadelphia to Sarnia is 428.9 miles (690.3 km) as the crow flies. Sarnia is located WNW of Philadelphia. By car, the driving distance is approximately 514.7 miles, taking about 10h 21min. A direct flight would take roughly 1h 22min. Philadelphia is in Pennsylvania, 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. 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. 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 Philadelphia 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.