There are
2,790 mi
from La Mesa, CA to Florham Park, NJ
That's the driving distance. It would take 2 days 2 hours to go from La Mesa, California to Florham Park, New Jersey.
The flight distance (direct flight from La Mesa, CA to Florham Park, NJ) is 2,398.93 mi.
2,790 mi = 4,490.40 kms