There are
469 mi
from Missoula, MT to Sammamish, WA
That's the driving distance. It would take 8 hours 37 mins to go from Missoula, Montana to Sammamish, Washington.
The flight distance (direct flight from Missoula, MT to Sammamish, WA) is 381.67 mi.
469 mi = 754.39 kms