There are
2,029 mi
from Clayton, MO to Gresham, OR
That's the driving distance. It would take 1 day 11 hours to go from Clayton, Missouri to Gresham, Oregon.
The flight distance (direct flight from Clayton, MO to Gresham, OR) is 1,700.79 mi.
2,029 mi = 3,265.11 kms