There are
745 mi
from San Clemente, CA to Klamath Falls, OR
That's the driving distance. It would take 13 hours 48 mins to go from San Clemente, California to Klamath Falls, Oregon.
The flight distance (direct flight from San Clemente, CA to Klamath Falls, OR) is 648.85 mi.
745 mi = 1,198.31 kms