WN 4725 then DL 5807 at Boston
Baltimore → Boston → Charlotte
Timetable, Boston time
08:05WN 4725 from Baltimore at the gate
20:10DL 5807 to Charlotte leaves the gate
12 h 05 apart on the timetable
DL 5807 leaves 12 h 05 after WN 4725 arrives on the timetable: more than half a day, so not a connection we count.