There are
2,462 mi
from Knoxville, TN to Hayward, CA
That's the driving distance. It would take 1 day 19 hours to go from Knoxville, Tennessee to Hayward, California.
The flight distance (direct flight from Knoxville, TN to Hayward, CA) is 2,099.54 mi.
2,462 mi = 3.22 kms