DL 4907 then DL 2646 at O'Hare
New York JFK → Chicago → Boston
Timetable, Chicago time
17:20DL 4907 from New York JFK at the gate
16:40DL 2646 to Boston leaves the gate
23 h 20 apart on the timetable, overnight
DL 2646 leaves 23 h 20 after DL 4907 arrives on the timetable: more than half a day, so not a connection we count.