Miles between Longmont, CO and Dubuque, IA

There are
858 mi
from Longmont, CO to Dubuque, IA

That's the driving distance. It would take 15 hours 29 mins to go from Longmont, Colorado to Dubuque, Iowa.

The flight distance (direct flight from Longmont, CO to Dubuque, IA) is 765.16 mi.

858 mi = 1,380.54 kms