There are
2,066 mi
from Great Falls, MT to Harrisonburg, VA
That's the driving distance. It would take 1 day 13 hours to go from Great Falls, Montana to Harrisonburg, Virginia.
The flight distance (direct flight from Great Falls, MT to Harrisonburg, VA) is 1,739.30 mi.
2,066 mi = 3,325.62 kms