There are
2,896 mi
from Half Moon Bay, CA to Middletown, DE
That's the driving distance. It would take 2 days 3 hours to go from Half Moon Bay, California to Middletown, Delaware.
The flight distance (direct flight from Half Moon Bay, CA to Middletown, DE) is 2,502.69 mi.
2,896 mi = 4,660.05 kms