There are
1,838 mi
from Topeka, KS to Seatac, WA
That's the driving distance. It would take 1 day 7 hours to go from Topeka, Kansas to Seatac, Washington.
The flight distance (direct flight from Topeka, KS to Seatac, WA) is 1,451.13 mi.
1,838 mi = 1.61 kms