Miles between Longmont, CO and Huron, SD

There are
621 mi
from Longmont, CO to Huron, SD

That's the driving distance. It would take 11 hours 31 mins to go from Longmont, Colorado to Huron, South Dakota.

The flight distance (direct flight from Longmont, CO to Huron, SD) is 455.88 mi.

621 mi = 998.95 kms