There are
2,029 mi
from St Charles, MO to Gladstone, OR
That's the driving distance. It would take 1 day 11 hours to go from St Charles, Missouri to Gladstone, Oregon.
The flight distance (direct flight from St Charles, MO to Gladstone, OR) is 1,694.56 mi.
2,029 mi = 3,264.92 kms