There are
2,174 mi
from Knoxville, TN to Fullerton, CA
That's the driving distance. It would take 1 day 13 hours to go from Knoxville, Tennessee to Fullerton, California.
The flight distance (direct flight from Knoxville, TN to Fullerton, CA) is 1,922.26 mi.
2,174 mi = 3,498.99 kms