UA 1457 then DL 676 at LAX
San Francisco → Los Angeles → New York JFK
Timetable, Los Angeles time
10:21UA 1457 from San Francisco at the gate
22:30DL 676 to New York JFK leaves the gate
12 h 09 apart on the timetable
DL 676 leaves 12 h 09 after UA 1457 arrives on the timetable: more than half a day, so not a connection we count.