There are
1,079 mi
from Thornton, CO to Mishawaka, IN
That's the driving distance. It would take 19 hours 19 mins to go from Thornton, Colorado to Mishawaka, Indiana.
The flight distance (direct flight from Thornton, CO to Mishawaka, IN) is 990.28 mi.
1,079 mi = 1.61 kms