There are
1,606 mi
from Missoula, MT to Chickasha, OK
That's the driving distance. It would take 1 day 2 hours to go from Missoula, Montana to Chickasha, Oklahoma.
The flight distance (direct flight from Missoula, MT to Chickasha, OK) is 1,166.10 mi.
1,606 mi = 1.61 kms