There are
258 mi
from Waterloo, IA to West Allis, WI
That's the driving distance. It would take 5 hours 5 mins to go from Waterloo, Iowa to West Allis, Wisconsin.
The flight distance (direct flight from Waterloo, IA to West Allis, WI) is 222.91 mi.
258 mi = 414.94 kms