AA 3232 then UA 4005 at Houston
Phoenix → Houston → Knoxville
Timetable, Houston time
23:54AA 3232 from Phoenix at the gate
18:40UA 4005 to Knoxville leaves the gate
18 h 46 apart on the timetable, overnight
UA 4005 leaves 18 h 46 after AA 3232 arrives on the timetable: more than half a day, so not a connection we count.