There are
2,068 mi
from Great Falls, MT to Mcdonough, GA
That's the driving distance. It would take 1 day 13 hours to go from Great Falls, Montana to Mcdonough, Georgia.
The flight distance (direct flight from Great Falls, MT to Mcdonough, GA) is 1,711.96 mi.
2,068 mi = 3,328.76 kms