Miles between Longmont, CO and South San Francisco, CA

There are
1,238 mi
from Longmont, CO to South San Francisco, CA

That's the driving distance. It would take 21 hours 17 mins to go from Longmont, Colorado to South San Francisco, California.

The flight distance (direct flight from Longmont, CO to South San Francisco, CA) is 944.88 mi.

1,238 mi = 1.61 kms