There are
957 mi
from Longmont, CO to Stoughton, WI
That's the driving distance. It would take 17 hours 32 mins to go from Longmont, Colorado to Stoughton, Wisconsin.
The flight distance (direct flight from Longmont, CO to Stoughton, WI) is 841.73 mi.
957 mi = 1,539.66 kms