There are
1,834 mi
from Half Moon Bay, CA to Gladstone, MO
That's the driving distance. It would take 1 day 7 hours to go from Half Moon Bay, California to Gladstone, Missouri.
The flight distance (direct flight from Half Moon Bay, CA to Gladstone, MO) is 1,509.54 mi.
1,834 mi = 2,951.69 kms