There are
2,711 mi
from Oceanside, CA to Greenbelt, MD
That's the driving distance. It would take 1 day 23 hours to go from Oceanside, California to Greenbelt, Maryland.
The flight distance (direct flight from Oceanside, CA to Greenbelt, MD) is 2,277.41 mi.
2,711 mi = 3.22 kms