There are
1,860 mi
from Olathe, KS to Seatac, WA
That's the driving distance. It would take 1 day 8 hours to go from Olathe, Kansas to Seatac, Washington.
The flight distance (direct flight from Olathe, KS to Seatac, WA) is 1,497.09 mi.
1,860 mi = 1.61 kms