There are
2,804 mi
from Pittsburg, CA to Greenbelt, MD
That's the driving distance. It would take 2 days 1 hour to go from Pittsburg, California to Greenbelt, Maryland.
The flight distance (direct flight from Pittsburg, CA to Greenbelt, MD) is 2,408.98 mi.
2,804 mi = 4,512.49 kms