There are
2,804 mi
from Bowie, MD to Walnut Creek, CA
That's the driving distance. It would take 2 days 1 hour to go from Bowie, Maryland to Walnut Creek, California.
The flight distance (direct flight from Bowie, MD to Walnut Creek, CA) is 2,425.74 mi.
2,804 mi = 4,512.35 kms