AA 2486 then DL 5630 at Charlotte
St Louis → Charlotte → Boston
Timetable, Charlotte time
16:49AA 2486 from St Louis at the gate
14:37DL 5630 to Boston leaves the gate
21 h 48 apart on the timetable, overnight
DL 5630 leaves 21 h 48 after AA 2486 arrives on the timetable: more than half a day, so not a connection we count.