AA 3232 then UA 5476 at Houston
Phoenix → Houston → Amarillo
Timetable, Houston time
23:54AA 3232 from Phoenix at the gate
20:40UA 5476 to Amarillo leaves the gate
20 h 46 apart on the timetable, overnight
UA 5476 leaves 20 h 46 after AA 3232 arrives on the timetable: more than half a day, so not a connection we count.