AA 4657 then B6 8353 at Boston
Washington National → Boston → New York JFK
Timetable, Boston time
16:47AA 4657 from Washington National at the gate
20:30B6 8353 to New York JFK leaves the gate
3 h 43 apart on the timetable
Boston’s board gives an arrival time for only about 58% of its flights, so many days show no gate time.
The last days
AA 4657 and B6 8353 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.