There are
1,822 mi
from Seattle, WA to Leavenworth, KS
That's the driving distance. It would take 1 day 7 hours to go from Seattle, Washington to Leavenworth, Kansas.
The flight distance (direct flight from Seattle, WA to Leavenworth, KS) is 1,479.46 mi.
1,822 mi = 1.61 kms