There are
2,107 mi
from St Charles, MO to Ashland, OR
That's the driving distance. It would take 1 day 12 hours to go from St Charles, Missouri to Ashland, Oregon.
The flight distance (direct flight from St Charles, MO to Ashland, OR) is 1,697.86 mi.
2,107 mi = 3,390.35 kms