Miles between Thornton, CO and Altoona, IA

There are
677 mi
from Thornton, CO to Altoona, IA

That's the driving distance. It would take 11 hours 45 mins to go from Thornton, Colorado to Altoona, Iowa.

The flight distance (direct flight from Thornton, CO to Altoona, IA) is 613.80 mi.

677 mi = 1,089.62 kms