There are
935 mi
from Thornton, CO to La Crosse, WI
That's the driving distance. It would take 16 hours 27 mins to go from Thornton, Colorado to La Crosse, Wisconsin.
The flight distance (direct flight from Thornton, CO to La Crosse, WI) is 756.23 mi.
935 mi = 1,504.49 kms