There are
2,139 mi
from Janesville, WI to Lompoc, CA
That's the driving distance. It would take 1 day 13 hours to go from Janesville, Wisconsin to Lompoc, California.
The flight distance (direct flight from Janesville, WI to Lompoc, CA) is 1,773.02 mi.
2,139 mi = 3,442.09 kms