There are
2,796 mi
from Union, NJ to Simi Valley, CA
That's the driving distance. It would take 2 days 2 hours to go from Union, New Jersey to Simi Valley, California.
The flight distance (direct flight from Union, NJ to Simi Valley, CA) is 2,454.18 mi.
2,796 mi = 4,500.29 kms