Miles between Longmont, CO and Duncanville, TX

There are
815 mi
from Longmont, CO to Duncanville, TX

That's the driving distance. It would take 15 hours 4 mins to go from Longmont, Colorado to Duncanville, Texas.

The flight distance (direct flight from Longmont, CO to Duncanville, TX) is 690.16 mi.

815 mi = 1,310.81 kms