There are 339.92 miles from Simi Valley to Napa in northwest direction and 395 miles (635.69 kilometers) by car, following the I-5 N route.
Simi Valley and Napa are 6 hours 6 mins far apart, if you drive non-stop .
This is the fastest route from Simi Valley, CA to Napa, CA. The halfway point is Coalinga, CA.
Simi Valley, CA and Napa, CA are in the same time zone (PDT). Current time in both locations is 6:57 am.
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