There are
2,811 mi
from Passaic, NJ to San Marcos, CA
That's the driving distance. It would take 2 days 1 hour to go from Passaic, New Jersey to San Marcos, California.
The flight distance (direct flight from Passaic, NJ to San Marcos, CA) is 2,408.69 mi.
2,811 mi = 4,524.32 kms