There are
2,573 mi
from Walnut Creek, CA to Monroeville, PA
That's the driving distance. It would take 1 day 20 hours to go from Walnut Creek, California to Monroeville, Pennsylvania.
The flight distance (direct flight from Walnut Creek, CA to Monroeville, PA) is 2,249.87 mi.
2,573 mi = 4,140.32 kms