DL 8839 then AA 5550 at Detroit
Philadelphia → Detroit → Charlotte
Timetable, Detroit time
02:33DL 8839 from Philadelphia at the gate
10:15AA 5550 to Charlotte leaves the gate
7 h 42 apart on the timetable
The last days
DL 8839 and AA 5550 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.