B6 6902 then AA 4659 at JFK
Istanbul → New York → Boston
Timetable, New York time
11:55B6 6902 from Istanbul at the gate
22:00AA 4659 to Boston leaves the gate
10 h 05 apart on the timetable
The last days
B6 6902 and AA 4659 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.