AA 1992 then AA 2947 at Charlotte
St Louis → Charlotte → Boston
Timetable, Charlotte time
13:14AA 1992 from St Louis at the gate
10:20AA 2947 to Boston leaves the gate
21 h 06 apart on the timetable, overnight
AA 2947 leaves 21 h 06 after AA 1992 arrives on the timetable: more than half a day, so not a connection we count.