There are
1,005 mi
from Waterloo, IA to Conroe, TX
That's the driving distance. It would take 18 hours 39 mins to go from Waterloo, Iowa to Conroe, Texas.
The flight distance (direct flight from Waterloo, IA to Conroe, TX) is 859.07 mi.
1,005 mi = 1,618.08 kms