DL 1965 then QR 701 at Boston
Miami → Boston → New York JFK
Timetable, Boston time
14:33DL 1965 from Miami at the gate
20:26QR 701 to New York JFK leaves the gate
5 h 53 apart on the timetable
The last days
DL 1965 and QR 701 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.