DL 2646 then DL 1133 at Boston
Chicago O'Hare → Boston → Atlanta
Timetable, Boston time
23:08DL 2646 from Chicago O'Hare at the gate
20:59DL 1133 to Atlanta leaves the gatealso B6 1897
21 h 51 apart on the timetable, overnight
DL 1133 leaves 21 h 51 after DL 2646 arrives on the timetable: more than half a day, so not a connection we count.