WN 3271 then B6 816 at San Francisco
Las Vegas → San Francisco → New York JFK
Timetable, San Francisco time
14:35WN 3271 from Las Vegas at the gate
16:25B6 816 to New York JFK leaves the gate
1 h 50 apart on the timetable
The last days
WN 3271 and B6 816 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.