There are
2,288 mi
from Johnson City, TN to Downey, CA
That's the driving distance. It would take 1 day 15 hours to go from Johnson City, Tennessee to Downey, California.
The flight distance (direct flight from Johnson City, TN to Downey, CA) is 2,017.07 mi.
2,288 mi = 3,681.78 kms