There are
686 mi
from Las Vegas, NV to Klamath Falls, OR
That's the driving distance. It would take 13 hours 38 mins to go from Las Vegas, Nevada to Klamath Falls, Oregon.
The flight distance (direct flight from Las Vegas, NV to Klamath Falls, OR) is 540.72 mi.
686 mi = 1,103.85 kms