AA 3987 then DL 5630 at Charlotte
Springfield → Charlotte → Boston
Timetable, Charlotte time
15:38AA 3987 from Springfield at the gate
14:37DL 5630 to Boston leaves the gate
22 h 59 apart on the timetable, overnight
DL 5630 leaves 22 h 59 after AA 3987 arrives on the timetable: more than half a day, so not a connection we count.