There are
1,080 mi
from Longmont, CO to Dyersburg, TN
That's the driving distance. It would take 19 hours 7 mins to go from Longmont, Colorado to Dyersburg, Tennessee.
The flight distance (direct flight from Longmont, CO to Dyersburg, TN) is 899.49 mi.
1,080 mi = 1.61 kms