There are
2,776 mi
from Walnut Creek, CA to Herndon, VA
That's the driving distance. It would take 2 days 1 hour to go from Walnut Creek, California to Herndon, Virginia.
The flight distance (direct flight from Walnut Creek, CA to Herndon, VA) is 2,394.52 mi.
2,776 mi = 4,466.95 kms