Miles between Longmont, CO and Walnut, CA

There are
1,021 mi
from Longmont, CO to Walnut, CA

That's the driving distance. It would take 18 hours to go from Longmont, Colorado to Walnut, California.

The flight distance (direct flight from Longmont, CO to Walnut, CA) is 820.43 mi.

1,021 mi = 1.61 kms