There are
874 mi
from Oklahoma City, OK to Wauwatosa, WI
That's the driving distance. It would take 15 hours 52 mins to go from Oklahoma City, Oklahoma to Wauwatosa, Wisconsin.
The flight distance (direct flight from Oklahoma City, OK to Wauwatosa, WI) is 729.27 mi.
874 mi = 1,407.26 kms