There are
2,515 mi
from Walnut Creek, CA to Hermitage, PA
That's the driving distance. It would take 1 day 19 hours to go from Walnut Creek, California to Hermitage, Pennsylvania.
The flight distance (direct flight from Walnut Creek, CA to Hermitage, PA) is 2,207.20 mi.
2,515 mi = 4,047.33 kms