AA 5122 then AA 6244 at Detroit
Philadelphia → Detroit → Chicago O'Hare
Timetable, Detroit time
15:30AA 5122 from Philadelphia at the gate
16:46AA 6244 to Chicago O'Hare leaves the gate
1 h 16 apart on the timetable
The last days
AA 5122 and AA 6244 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.