There are
1,531 mi
from Allentown, PA to Tomball, TX
That's the driving distance. It would take 1 day 4 hours to go from Allentown, Pennsylvania to Tomball, Texas.
The flight distance (direct flight from Allentown, PA to Tomball, TX) is 1,341.72 mi.
1,531 mi = 1.61 kms