Mount Vernon, Illinois to Portsmouth, Ohio: Road Trip Guide & Distance

How far is Mount Vernon, Illinois from Portsmouth, Ohio?

The distance from Mount Vernon, Illinois to Portsmouth, Ohio is 320.4 miles (515.7 km) as the crow flies. Portsmouth, Ohio is located E of Mount Vernon, Illinois. By car, the driving distance is approximately 384.5 miles, taking about 7h 44min. A direct flight would take roughly 1h 9min. Both are located in United States — Mount Vernon, Illinois in Illinois and Portsmouth, Ohio in Ohio.

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 Mount Vernon, Illinois and Portsmouth, Ohio. 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.