AA 644 then AA 2043 at Phoenix
Tampa → Phoenix → St Louis
Timetable, Phoenix time
20:50AA 644 from Tampa at the gate
19:56AA 2043 to St Louis leaves the gate
23 h 06 apart on the timetable, overnight
AA 2043 leaves 23 h 06 after AA 644 arrives on the timetable: more than half a day, so not a connection we count.