There are
1,027 mi
from Waterloo, IA to Tomball, TX
That's the driving distance. It would take 19 hours 11 mins to go from Waterloo, Iowa to Tomball, Texas.
The flight distance (direct flight from Waterloo, IA to Tomball, TX) is 875.44 mi.
1,027 mi = 1,653.00 kms