Miles between Napa, CA and Simi Valley, CA

There are
395 mi
from Napa, CA to Simi Valley, CA

That's the driving distance. It would take 7 hours 27 mins to go from Napa, California to Simi Valley, California.

The flight distance (direct flight from Napa, CA to Simi Valley, CA) is 340.70 mi.

395 mi = 636.40 kms