AA 5480 then AA 3364 at Detroit
Philadelphia → Detroit → Chicago O'Hare
Timetable, Detroit time
10:41AA 5480 from Philadelphia at the gate
13:34AA 3364 to Chicago O'Hare leaves the gate
2 h 53 apart on the timetable
The last days
AA 5480 and AA 3364 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.