There are
2,165 mi
from Downey, CA to Oak Ridge, TN
That's the driving distance. It would take 1 day 13 hours to go from Downey, California to Oak Ridge, Tennessee.
The flight distance (direct flight from Downey, CA to Oak Ridge, TN) is 1,912.90 mi.
2,165 mi = 3,484.04 kms