DL 459 then DL 5837 at Boston
Seattle → Boston → Charlotte
Timetable, Boston time
16:00DL 459 from Seattle at the gate
15:10DL 5837 to Charlotte leaves the gate
23 h 10 apart on the timetable, overnight
DL 5837 leaves 23 h 10 after DL 459 arrives on the timetable: more than half a day, so not a connection we count.