There are
2,457 mi
from Hayward, CA to Knoxville, TN
That's the driving distance. It would take 1 day 18 hours to go from Hayward, California to Knoxville, Tennessee.
The flight distance (direct flight from Hayward, CA to Knoxville, TN) is 2,099.54 mi.
2,457 mi = 3,953.75 kms