DL 987 then DL 5622 at Boston
Atlanta → Boston → Richmond
Timetable, Boston time
09:45DL 987 from Atlanta at the gate
08:50DL 5622 to Richmond leaves the gate
23 h 05 apart on the timetable, overnight
DL 5622 leaves 23 h 05 after DL 987 arrives on the timetable: more than half a day, so not a connection we count.