There are
1,793 mi
from Waterloo, IA to Downey, CA
That's the driving distance. It would take 1 day 7 hours to go from Waterloo, Iowa to Downey, California.
The flight distance (direct flight from Waterloo, IA to Downey, CA) is 1,511.96 mi.
1,793 mi = 2,886.32 kms