AA 1428 then DL 5845 at Philadelphia
Atlanta → Philadelphia → Boston
Timetable, Philadelphia time
09:47AA 1428 from Atlanta at the gate
09:00DL 5845 to Boston leaves the gate
23 h 13 apart on the timetable, overnight
DL 5845 leaves 23 h 13 after AA 1428 arrives on the timetable: more than half a day, so not a connection we count.