There are
1,986 mi
from Janesville, WI to Placentia, CA
That's the driving distance. It would take 1 day 10 hours to go from Janesville, Wisconsin to Placentia, California.
The flight distance (direct flight from Janesville, WI to Placentia, CA) is 1,668.97 mi.
1,986 mi = 3,195.47 kms