There are
2,450 mi
from Knoxville, TN to Sunnyvale, CA
That's the driving distance. It would take 1 day 19 hours to go from Knoxville, Tennessee to Sunnyvale, California.
The flight distance (direct flight from Knoxville, TN to Sunnyvale, CA) is 2,100.30 mi.
2,450 mi = 3,942.29 kms