AA 1391 then AA 338 at Phoenix
Philadelphia → Phoenix → Chicago O'Hare
Timetable, Phoenix time
10:29AA 1391 from Philadelphia at the gate
12:23AA 338 to Chicago O'Hare leaves the gate
1 h 54 apart on the timetable
The last days
AA 1391 and AA 338 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.