There are
2,463 mi
from Knoxville, TN to Walnut Creek, CA
That's the driving distance. It would take 1 day 19 hours to go from Knoxville, Tennessee to Walnut Creek, California.
The flight distance (direct flight from Knoxville, TN to Walnut Creek, CA) is 2,096.27 mi.
2,463 mi = 3,964.30 kms