There are
1,972 mi
from Columbia, MO to Seatac, WA
That's the driving distance. It would take 1 day 10 hours to go from Columbia, Missouri to Seatac, Washington.
The flight distance (direct flight from Columbia, MO to Seatac, WA) is 1,608.18 mi.
1,972 mi = 1.61 kms