Miles between Simi Valley, CA and Thornton, CO

There are
1,042 mi
from Simi Valley, CA to Thornton, CO

That's the driving distance. It would take 18 hours 33 mins to go from Simi Valley, California to Thornton, Colorado.

The flight distance (direct flight from Simi Valley, CA to Thornton, CO) is 852.60 mi.

1,042 mi = 1.61 kms