There are
1,780 mi
from Garland, TX to Kalispell, MT
That's the driving distance. It would take 1 day 7 hours to go from Garland, Texas to Kalispell, Montana.
The flight distance (direct flight from Garland, TX to Kalispell, MT) is 1,399.09 mi.
1,780 mi = 1.61 kms