Mammoth Cave to Portsmouth, Ohio: Road Trip Guide & Distance

How far is Mammoth Cave from Portsmouth, Ohio?

The distance from Mammoth Cave to Portsmouth, Ohio is 199.9 miles (321.7 km) as the crow flies. Portsmouth, Ohio is located ENE of Mammoth Cave. By car, the driving distance is approximately 249.9 miles, taking about 5h 2min. A direct flight would take roughly 54min. Both are located in United States — Mammoth Cave in Kentucky and Portsmouth, Ohio in Ohio.

For a drive of this length, it's recommended to plan at least one quick rest stop to stretch your legs and grab a coffee. Heading East means you'll be driving into the sunrise if you start early. Keep your windshield clean for the best visibility. 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 Mammoth Cave 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.