Miles between Longmont, CO and Dallas, TX

There are
814 mi
from Longmont, CO to Dallas, TX

That's the driving distance. It would take 15 hours 3 mins to go from Longmont, Colorado to Dallas, Texas.

The flight distance (direct flight from Longmont, CO to Dallas, TX) is 687.19 mi.

814 mi = 1,309.55 kms