There are
1,877 mi
from Waterloo, IA to St Helens, OR
That's the driving distance. It would take 1 day 9 hours to go from Waterloo, Iowa to St Helens, Oregon.
The flight distance (direct flight from Waterloo, IA to St Helens, OR) is 1,518.43 mi.
1,877 mi = 3,020.02 kms