B6 178 then DL 5845 at Boston
Las Vegas → Boston → Philadelphia
Timetable, Boston time
07:54B6 178 from Las Vegas at the gate
07:25DL 5845 to Philadelphia leaves the gate
23 h 31 apart on the timetable, overnight
DL 5845 leaves 23 h 31 after B6 178 arrives on the timetable: more than half a day, so not a connection we count.