There are
2,307 mi
from Johnson City, TN to Simi Valley, CA
That's the driving distance. It would take 1 day 16 hours to go from Johnson City, Tennessee to Simi Valley, California.
The flight distance (direct flight from Johnson City, TN to Simi Valley, CA) is 2,047.11 mi.
2,307 mi = 3,712.22 kms