AA 847 then AA 535 at Charlotte
Philadelphia → Charlotte → Chicago O'Hare
Timetable, Charlotte time
12:30AA 847 from Philadelphia at the gate
21:12AA 535 to Chicago O'Hare leaves the gate
8 h 42 apart on the timetable
The last days
AA 847 and AA 535 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.