There are
696 mi
from Downey, CA to Klamath Falls, OR
That's the driving distance. It would take 12 hours 50 mins to go from Downey, California to Klamath Falls, Oregon.
The flight distance (direct flight from Downey, CA to Klamath Falls, OR) is 605.69 mi.
696 mi = 1,120.25 kms