There are
2,765 mi
from Downey, CA to Highland Park, NJ
That's the driving distance. It would take 2 days 1 hour to go from Downey, California to Highland Park, New Jersey.
The flight distance (direct flight from Downey, CA to Highland Park, NJ) is 2,421.95 mi.
2,765 mi = 4,449.15 kms