Greater Upper Marlboro to Portsmouth, Ohio: Road Trip Guide & Distance

How far is Greater Upper Marlboro from Portsmouth, Ohio?

The distance from Greater Upper Marlboro to Portsmouth, Ohio is 336.6 miles (541.7 km) as the crow flies. Portsmouth, Ohio is located W of Greater Upper Marlboro. By car, the driving distance is approximately 403.9 miles, taking about 8h 8min. A direct flight would take roughly 1h 11min. Both are located in United States — Greater Upper Marlboro in Maryland 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. 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.

Coordinates come from public place data for Greater Upper Marlboro 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.