DL 1780 then DL 5851 at Boston
Atlanta → Boston → Baltimore
Timetable, Boston time
23:27DL 1780 from Atlanta at the gate
21:59DL 5851 to Baltimore leaves the gate
22 h 32 apart on the timetable, overnight
DL 5851 leaves 22 h 32 after DL 1780 arrives on the timetable: more than half a day, so not a connection we count.