VA 8576 then IB 4975 at San Francisco
Las Vegas → San Francisco → New York JFK
Timetable, San Francisco time
19:03VA 8576 from Las Vegas at the gate
12:08IB 4975 to New York JFK leaves the gate
17 h 05 apart on the timetable, overnight
IB 4975 leaves 17 h 05 after VA 8576 arrives on the timetable: more than half a day, so not a connection we count.