WN 4725 then DL 5845 at Boston
Baltimore → Boston → Philadelphia
Timetable, Boston time
08:05WN 4725 from Baltimore at the gate
07:45DL 5845 to Philadelphia leaves the gate
23 h 40 apart on the timetable, overnight
DL 5845 leaves 23 h 40 after WN 4725 arrives on the timetable: more than half a day, so not a connection we count.