AA 1992 then AA 5572 at Charlotte
St Louis → Charlotte → Lexington
Timetable, Charlotte time
13:14AA 1992 from St Louis at the gate
11:20AA 5572 to Lexington leaves the gate
22 h 06 apart on the timetable, overnight
AA 5572 leaves 22 h 06 after AA 1992 arrives on the timetable: more than half a day, so not a connection we count.