Miles between Greeley, CO and Spencer, IA

There are
644 mi
from Greeley, CO to Spencer, IA

That's the driving distance. It would take 12 hours 33 mins to go from Greeley, Colorado to Spencer, Iowa.

The flight distance (direct flight from Greeley, CO to Spencer, IA) is 527.05 mi.

644 mi = 1,035.69 kms