UA 3547 then DL 508 at Boston
Newark → Boston → Los Angeles
Timetable, Boston time
17:45UA 3547 from Newark at the gate
16:15DL 508 to Los Angeles leaves the gate
22 h 30 apart on the timetable, overnight
DL 508 leaves 22 h 30 after UA 3547 arrives on the timetable: more than half a day, so not a connection we count.