Miles between Longmont, CO and Boone, IA

There are
690 mi
from Longmont, CO to Boone, IA

That's the driving distance. It would take 12 hours 21 mins to go from Longmont, Colorado to Boone, Iowa.

The flight distance (direct flight from Longmont, CO to Boone, IA) is 598.13 mi.

690 mi = 1,110.99 kms