There are
1,338 mi
from Sunnyvale, CA to Hereford, TX
That's the driving distance. It would take 23 hours 49 mins to go from Sunnyvale, California to Hereford, Texas.
The flight distance (direct flight from Sunnyvale, CA to Hereford, TX) is 1,108.46 mi.
1,338 mi = 1.61 kms