There are
2,178 mi
from Knoxville, TN to Placentia, CA
That's the driving distance. It would take 1 day 14 hours to go from Knoxville, Tennessee to Placentia, California.
The flight distance (direct flight from Knoxville, TN to Placentia, CA) is 1,919.16 mi.
2,178 mi = 3.22 kms