Miles between Longmont, CO and Mandan, ND

There are
686 mi
from Longmont, CO to Mandan, ND

That's the driving distance. It would take 12 hours 27 mins to go from Longmont, Colorado to Mandan, North Dakota.

The flight distance (direct flight from Longmont, CO to Mandan, ND) is 506.05 mi.

686 mi = 1,104.01 kms