There are
3,193 mi
from Walnut Creek, CA to Waterville, ME
That's the driving distance. It would take 2 days 10 hours to go from Walnut Creek, California to Waterville, Maine.
The flight distance (direct flight from Walnut Creek, CA to Waterville, ME) is 2,715.49 mi.
3,193 mi = 5,139.22 kms