There are
1,942 mi
from Great Falls, MT to Sevierville, TN
That's the driving distance. It would take 1 day 10 hours to go from Great Falls, Montana to Sevierville, Tennessee.
The flight distance (direct flight from Great Falls, MT to Sevierville, TN) is 1,628.81 mi.
1,942 mi = 3,125.43 kms