Miles between Longmont, CO and Costa Mesa, CA

There are
1,046 mi
from Longmont, CO to Costa Mesa, CA

That's the driving distance. It would take 18 hours 28 mins to go from Longmont, Colorado to Costa Mesa, California.

The flight distance (direct flight from Longmont, CO to Costa Mesa, CA) is 838.19 mi.

1,046 mi = 1.61 kms