UA 237 then QF 3654 at San Francisco
West Palm Beach → San Francisco → New York JFK
Timetable, San Francisco time
21:05UA 237 from West Palm Beach at the gate
23:00QF 3654 to New York JFK leaves the gate
1 h 55 apart on the timetable
The last days
UA 237 and QF 3654 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.