There are
1,061 mi
from Thornton, CO to Sheboygan, WI
That's the driving distance. It would take 19 hours 20 mins to go from Thornton, Colorado to Sheboygan, Wisconsin.
The flight distance (direct flight from Thornton, CO to Sheboygan, WI) is 926.38 mi.
1,061 mi = 1.61 kms