There are
1,217 mi
from Longmont, CO to Danville, KY
That's the driving distance. It would take 21 hours 48 mins to go from Longmont, Colorado to Danville, Kentucky.
The flight distance (direct flight from Longmont, CO to Danville, KY) is 1,104.35 mi.
1,217 mi = 1,958.13 kms