There are
1,844 mi
from Seattle, WA to Merriam, KS
That's the driving distance. It would take 1 day 7 hours to go from Seattle, Washington to Merriam, Kansas.
The flight distance (direct flight from Seattle, WA to Merriam, KS) is 1,500.39 mi.
1,844 mi = 1.61 kms