There are
765 mi
from Longmont, CO to Cottonwood, AZ
That's the driving distance. It would take 14 hours 49 mins to go from Longmont, Colorado to Cottonwood, Arizona.
The flight distance (direct flight from Longmont, CO to Cottonwood, AZ) is 532.78 mi.
765 mi = 1,231.35 kms