There are
2,643 mi
from Rialto, CA to Greenbelt, MD
That's the driving distance. It would take 1 day 22 hours to go from Rialto, California to Greenbelt, Maryland.
The flight distance (direct flight from Rialto, CA to Greenbelt, MD) is 2,254.11 mi.
2,643 mi = 3.22 kms