There are
994 mi
from Garland, TX to Oconomowoc, WI
That's the driving distance. It would take 18 hours 37 mins to go from Garland, Texas to Oconomowoc, Wisconsin.
The flight distance (direct flight from Garland, TX to Oconomowoc, WI) is 831.46 mi.
994 mi = 1,600.05 kms