AA 4721 then DL 5779 at JFK
Boston → New York → Pittsburgh
Timetable, New York time
19:03AA 4721 from Boston at the gate
19:35DL 5779 to Pittsburgh leaves the gate
32 min apart on the timetable
The last days
AA 4721 and DL 5779 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.