There are
1,255 mi
from Missoula, MT to Calexico, CA
That's the driving distance. It would take 21 hours 27 mins to go from Missoula, Montana to Calexico, California.
The flight distance (direct flight from Missoula, MT to Calexico, CA) is 982.95 mi.
1,255 mi = 1.61 kms