There are
2,825 mi
from Walnut Creek, CA to Bethlehem, PA
That's the driving distance. It would take 2 days 1 hour to go from Walnut Creek, California to Bethlehem, Pennsylvania.
The flight distance (direct flight from Walnut Creek, CA to Bethlehem, PA) is 2,475.53 mi.
2,825 mi = 4,547.11 kms