There are
1,529 mi
from Great Falls, MT to Wabash, IN
That's the driving distance. It would take 1 day 3 hours to go from Great Falls, Montana to Wabash, Indiana.
The flight distance (direct flight from Great Falls, MT to Wabash, IN) is 1,338.06 mi.
1,529 mi = 2,459.99 kms