There are
2,168 mi
from Union City, TN to Hayward, CA
That's the driving distance. It would take 1 day 14 hours to go from Union City, Tennessee to Hayward, California.
The flight distance (direct flight from Union City, TN to Hayward, CA) is 1,813.77 mi.
2,168 mi = 3,488.42 kms