Dayton to Gaithersburg: Road Trip Guide & Distance

How far is Dayton from Gaithersburg?

The distance from Dayton to Gaithersburg is 375.2 miles (603.9 km) as the crow flies. Gaithersburg is located E of Dayton. By car, the driving distance is approximately 450.3 miles, taking about 9h 4min. A direct flight would take roughly 1h 15min. Both are located in United States — Dayton in Ohio and Gaithersburg in Maryland.

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 Dayton and Gaithersburg. 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.