AA 1428 then AA 5525 at Philadelphia
Atlanta → Philadelphia → Toronto
Timetable, Philadelphia time
09:47AA 1428 from Atlanta at the gate
19:55AA 5525 to Toronto leaves the gate
10 h 08 apart on the timetable
The last days
AA 1428 and AA 5525 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.