There are
1,086 mi
from Walnut Creek, CA to Kalispell, MT
That's the driving distance. It would take 21 hours 17 mins to go from Walnut Creek, California to Kalispell, Montana.
The flight distance (direct flight from Walnut Creek, CA to Kalispell, MT) is 810.80 mi.
1,086 mi = 1,747.05 kms