Miles between Longmont, CO and San Mateo, CA

There are
1,247 mi
from Longmont, CO to San Mateo, CA

That's the driving distance. It would take 21 hours 29 mins to go from Longmont, Colorado to San Mateo, California.

The flight distance (direct flight from Longmont, CO to San Mateo, CA) is 942.34 mi.

1,247 mi = 1.61 kms