There are
2,642 mi
from Downey, CA to Manassas Park, VA
That's the driving distance. It would take 1 day 22 hours to go from Downey, California to Manassas Park, Virginia.
The flight distance (direct flight from Downey, CA to Manassas Park, VA) is 2,268.33 mi.
2,642 mi = 4,252.07 kms