Napa to Simi Valley: Road Trip Guide & Distance

How far is Napa from Simi Valley?

The distance from Napa to Simi Valley is 339.9 miles (547 km) as the crow flies. Simi Valley is located SE of Napa. By car, the driving distance is approximately 407.9 miles, taking about 8h 12min. A direct flight would take roughly 1h 11min. Both are located in United States.

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 Napa and Simi Valley. 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.