There are
1,884 mi
from Pasco, WA to St Charles, MO
That's the driving distance. It would take 1 day 8 hours to go from Pasco, Washington to St Charles, Missouri.
The flight distance (direct flight from Pasco, WA to St Charles, MO) is 1,534.36 mi.
1,884 mi = 3,032.03 kms