UA 360 then DL 991 at LAX
Boston → Los Angeles → New York JFK
Timetable, Los Angeles time
12:03UA 360 from Boston at the gate
11:25DL 991 to New York JFK leaves the gate
23 h 22 apart on the timetable, overnight
DL 991 leaves 23 h 22 after UA 360 arrives on the timetable: more than half a day, so not a connection we count.