There are
2,744 mi
from Somerville, NJ to Downey, CA
That's the driving distance. It would take 2 days 1 hour to go from Somerville, New Jersey to Downey, California.
The flight distance (direct flight from Somerville, NJ to Downey, CA) is 2,411.90 mi.
2,744 mi = 4,415.27 kms