There are
2,183 mi
from Knoxville, TN to Downey, CA
That's the driving distance. It would take 1 day 13 hours to go from Knoxville, Tennessee to Downey, California.
The flight distance (direct flight from Knoxville, TN to Downey, CA) is 1,932.66 mi.
2,183 mi = 3,512.95 kms