AA 1252 then AA 867 at Miami
Philadelphia → Miami → New York JFK
Timetable, Miami time
08:59AA 1252 from Philadelphia at the gate
19:30AA 867 to New York JFK leaves the gate
10 h 31 apart on the timetable
The last days
AA 1252 and AA 867 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.