There are
1,955 mi
from Janesville, WI to Rancho Cucamonga, CA
That's the driving distance. It would take 1 day 10 hours to go from Janesville, Wisconsin to Rancho Cucamonga, California.
The flight distance (direct flight from Janesville, WI to Rancho Cucamonga, CA) is 1,647.17 mi.
1,955 mi = 3,147.05 kms