AA 525 then AA 4508 at JFK
Miami → New York → Washington National
Timetable, New York time
09:43AA 525 from Miami at the gate
17:29AA 4508 to Washington National leaves the gate
7 h 46 apart on the timetable
The last days
AA 525 and AA 4508 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.