There are
1,574 mi
from Kalispell, MT to Altus, OK
That's the driving distance. It would take 1 day 3 hours to go from Kalispell, Montana to Altus, Oklahoma.
The flight distance (direct flight from Kalispell, MT to Altus, OK) is 1,212.32 mi.
1,574 mi = 2,533.25 kms