There are
1,555 mi
from Great Falls, MT to Crawfordsville, IN
That's the driving distance. It would take 1 day 3 hours to go from Great Falls, Montana to Crawfordsville, Indiana.
The flight distance (direct flight from Great Falls, MT to Crawfordsville, IN) is 1,316.12 mi.
1,555 mi = 2,502.52 kms