Just a bit more to consider....
From what I can tell, inbound flights from HOU arrive in either the B or C terminals in ATL. The outbound to STT runs out of the T terminal.
This means you'll have to get from your inbound gate, to the terminal train and then to the outbound gate (or you can make a mad dash through the hallways) in less than 20 minutes.
Seriously? Don't even bother.
