There are
1,084 mi
from Longmont, CO to Mishawaka, IN
That's the driving distance. It would take 19 hours 36 mins to go from Longmont, Colorado to Mishawaka, Indiana.
The flight distance (direct flight from Longmont, CO to Mishawaka, IN) is 992.44 mi.
1,084 mi = 1.61 kms