There are
2,637 mi
from Fontana, CA to Greenbelt, MD
That's the driving distance. It would take 1 day 22 hours to go from Fontana, California to Greenbelt, Maryland.
The flight distance (direct flight from Fontana, CA to Greenbelt, MD) is 2,257.94 mi.
2,637 mi = 4,244.55 kms