There are
1,788 mi
from Waterloo, IA to Mill Creek, WA
That's the driving distance. It would take 1 day 7 hours to go from Waterloo, Iowa to Mill Creek, Washington.
The flight distance (direct flight from Waterloo, IA to Mill Creek, WA) is 1,490.73 mi.
1,788 mi = 2,878.21 kms