Miles between Great Falls, MT and Simi Valley, CA

There are
1,275 mi
from Great Falls, MT to Simi Valley, CA

That's the driving distance. It would take 21 hours 46 mins to go from Great Falls, Montana to Simi Valley, California.

The flight distance (direct flight from Great Falls, MT to Simi Valley, CA) is 993 mi.

1,275 mi = 2,052.68 kms