There are
2,580 mi
from Costa Mesa, CA to Hagerstown, MD
That's the driving distance. It would take 1 day 22 hours to go from Costa Mesa, California to Hagerstown, Maryland.
The flight distance (direct flight from Costa Mesa, CA to Hagerstown, MD) is 2,247.67 mi.
2,580 mi = 4,152.26 kms