AA 5984 then AA 2937 at Charlotte
Florence → Charlotte → St Louis
Timetable, Charlotte time
16:44AA 5984 from Florence at the gate
16:28AA 2937 to St Louis leaves the gate
23 h 44 apart on the timetable, overnight
AA 2937 leaves 23 h 44 after AA 5984 arrives on the timetable: more than half a day, so not a connection we count.