AA 3232 then UA 4816 at Houston
Phoenix → Houston → Huntsville
Timetable, Houston time
23:54AA 3232 from Phoenix at the gate
20:04UA 4816 to Huntsville leaves the gate
20 h 10 apart on the timetable, overnight
UA 4816 leaves 20 h 10 after AA 3232 arrives on the timetable: more than half a day, so not a connection we count.