Miles between Longmont, CO and Spencer, IA

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

That's the driving distance. It would take 12 hours 52 mins to go from Longmont, Colorado to Spencer, Iowa.

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

688 mi = 1,106.63 kms