There are
1,740 mi
from Missoula, MT to Zionsville, IN
That's the driving distance. It would take 1 day 6 hours to go from Missoula, Montana to Zionsville, Indiana.
The flight distance (direct flight from Missoula, MT to Zionsville, IN) is 1,463.77 mi.
1,740 mi = 1.61 kms