There are
1,845 mi
from Olathe, KS to Sammamish, WA
That's the driving distance. It would take 1 day 8 hours to go from Olathe, Kansas to Sammamish, Washington.
The flight distance (direct flight from Olathe, KS to Sammamish, WA) is 1,489.16 mi.
1,845 mi = 1.61 kms