There are
1,919 mi
from Hayward, CA to Waterloo, IA
That's the driving distance. It would take 1 day 9 hours to go from Hayward, California to Waterloo, Iowa.
The flight distance (direct flight from Hayward, CA to Waterloo, IA) is 1,598.38 mi.
1,919 mi = 1.61 kms