Miles between Thornton, CO and Healdsburg, CA

There are
1,266 mi
from Thornton, CO to Healdsburg, CA

That's the driving distance. It would take 21 hours 51 mins to go from Thornton, Colorado to Healdsburg, California.

The flight distance (direct flight from Thornton, CO to Healdsburg, CA) is 960.05 mi.

1,266 mi = 1.61 kms