AM 4294 then B6 316 at San Francisco
Los Angeles → San Francisco → New York JFK
Timetable, San Francisco time
08:59AM 4294 from Los Angeles at the gate
12:30B6 316 to New York JFK leaves the gate
3 h 31 apart on the timetable
The last days
AM 4294 and B6 316 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.