Cornwall to Saint John: Road Trip Guide & Distance

How far is Cornwall from Saint John?

The distance from Cornwall to Saint John is 422.8 miles (680.4 km) as the crow flies. Saint John is located E of Cornwall. By car, the driving distance is approximately 507.3 miles, taking about 10h 12min. A direct flight would take roughly 1h 21min. Both are located in Canada — Cornwall in Ontario and Saint John in New Brunswick.

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.

Coordinates come from public place data for Cornwall and Saint John. 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.