There are
2,064 mi
from St Charles, MO to Longview, WA
That's the driving distance. It would take 1 day 11 hours to go from St Charles, Missouri to Longview, Washington.
The flight distance (direct flight from St Charles, MO to Longview, WA) is 1,715.45 mi.
2,064 mi = 3,322.42 kms