There are
805 mi
from St George, UT to Klamath Falls, OR
That's the driving distance. It would take 15 hours 46 mins to go from St George, Utah to Klamath Falls, Oregon.
The flight distance (direct flight from St George, UT to Klamath Falls, OR) is 561.71 mi.
805 mi = 1,295.73 kms