UA 2210 then DL 5845 at Boston
Los Angeles → Boston → Philadelphia
Timetable, Boston time
07:15UA 2210 from Los Angeles at the gate
06:40DL 5845 to Philadelphia leaves the gate
23 h 25 apart on the timetable, overnight
DL 5845 leaves 23 h 25 after UA 2210 arrives on the timetable: more than half a day, so not a connection we count.