There are
2,759 mi
from Keansburg, NJ to Monrovia, CA
That's the driving distance. It would take 2 days 1 hour to go from Keansburg, New Jersey to Monrovia, California.
The flight distance (direct flight from Keansburg, NJ to Monrovia, CA) is 2,425.11 mi.
2,759 mi = 4,440.83 kms