There are
690 mi
from Hawthorne, CA to Klamath Falls, OR
That's the driving distance. It would take 12 hours 42 mins to go from Hawthorne, California to Klamath Falls, Oregon.
The flight distance (direct flight from Hawthorne, CA to Klamath Falls, OR) is 603.46 mi.
690 mi = 1,110.07 kms