There are
950 mi
from Longmont, CO to Waunakee, WI
That's the driving distance. It would take 17 hours 30 mins to go from Longmont, Colorado to Waunakee, Wisconsin.
The flight distance (direct flight from Longmont, CO to Waunakee, WI) is 832.64 mi.
950 mi = 1,528.54 kms