UA 1855 then DL 972 at LAX
Sacramento → Los Angeles → New York JFK
Timetable, Los Angeles time
09:02UA 1855 from Sacramento at the gate
08:25DL 972 to New York JFK leaves the gate
23 h 23 apart on the timetable, overnight
DL 972 leaves 23 h 23 after UA 1855 arrives on the timetable: more than half a day, so not a connection we count.