There are
1,981 mi
from Naperville, IL to San Jacinto, CA
That's the driving distance. It would take 1 day 10 hours to go from Naperville, Illinois to San Jacinto, California.
The flight distance (direct flight from Naperville, IL to San Jacinto, CA) is 1,658.24 mi.
1,981 mi = 1.61 kms