JU 8510 then UA 2179 at San Francisco
New York JFK → San Francisco → Los Angeles
Timetable, San Francisco time
23:54JU 8510 from New York JFK at the gate
22:50UA 2179 to Los Angeles leaves the gatealso VA 8051, NZ 9254
22 h 56 apart on the timetable, overnight
UA 2179 leaves 22 h 56 after JU 8510 arrives on the timetable: more than half a day, so not a connection we count.