Miles between Boulder, CO and Simi Valley, CA

There are
1,046 mi
from Boulder, CO to Simi Valley, CA

That's the driving distance. It would take 18 hours 42 mins to go from Boulder, Colorado to Simi Valley, California.

The flight distance (direct flight from Boulder, CO to Simi Valley, CA) is 842.06 mi.

1,046 mi = 1.61 kms