Miles between Thornton, CO and Simi Valley, CA

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

That's the driving distance. It would take 18 hours 30 mins to go from Thornton, Colorado to Simi Valley, California.

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

1,042 mi = 1.61 kms