Miles between Longmont, CO and Spencer, IA

There are
669 mi
from Longmont, CO to Spencer, IA

That's the driving distance. It would take 12 hours 51 mins to go from Longmont, Colorado to Spencer, Iowa.

The flight distance (direct flight from Longmont, CO to Spencer, IA) is 553.25 mi.

669 mi = 1,076.36 kms