There are
2,798 mi
from Walnut Creek, CA to Ephrata, PA
That's the driving distance. It would take 2 days to go from Walnut Creek, California to Ephrata, Pennsylvania.
The flight distance (direct flight from Walnut Creek, CA to Ephrata, PA) is 2,439.90 mi.
2,798 mi = 4,502.32 kms