There are
1,947 mi
from Yakima, WA to St Charles, MO
That's the driving distance. It would take 1 day 9 hours to go from Yakima, Washington to St Charles, Missouri.
The flight distance (direct flight from Yakima, WA to St Charles, MO) is 1,604.38 mi.
1,947 mi = 1.61 kms