There are
2,560 mi
from Johnson City, TN to Fremont, CA
That's the driving distance. It would take 1 day 21 hours to go from Johnson City, Tennessee to Fremont, California.
The flight distance (direct flight from Johnson City, TN to Fremont, CA) is 2,174.43 mi.
2,560 mi = 4,119.38 kms