VA 8576 then B6 816 at San Francisco
Las Vegas → San Francisco → New York JFK
Timetable, San Francisco time
19:03VA 8576 from Las Vegas at the gate
16:25B6 816 to New York JFK leaves the gate
21 h 22 apart on the timetable, overnight
B6 816 leaves 21 h 22 after VA 8576 arrives on the timetable: more than half a day, so not a connection we count.