There are
1,913 mi
from Tuscaloosa, AL to Great Falls, MT
That's the driving distance. It would take 1 day 11 hours to go from Tuscaloosa, Alabama to Great Falls, Montana.
The flight distance (direct flight from Tuscaloosa, AL to Great Falls, MT) is 1,581.48 mi.
1,913 mi = 3,079.12 kms