There are
1,548 mi
from Great Falls, MT to Midlothian, TX
That's the driving distance. It would take 1 day 3 hours to go from Great Falls, Montana to Midlothian, Texas.
The flight distance (direct flight from Great Falls, MT to Midlothian, TX) is 1,280.13 mi.
1,548 mi = 2,491.10 kms