AA 853 then DL 5630 at Charlotte
Las Vegas → Charlotte → Boston
Timetable, Charlotte time
15:50AA 853 from Las Vegas at the gate
14:37DL 5630 to Boston leaves the gate
22 h 47 apart on the timetable, overnight
DL 5630 leaves 22 h 47 after AA 853 arrives on the timetable: more than half a day, so not a connection we count.