DL 5648 then DL 5622 at Boston
Charlotte → Boston → Richmond
Timetable, Boston time
09:01DL 5648 from Charlotte at the gate
08:50DL 5622 to Richmond leaves the gate
23 h 49 apart on the timetable, overnight
DL 5622 leaves 23 h 49 after DL 5648 arrives on the timetable: more than half a day, so not a connection we count.