DL 1391 then AA 6325 at Detroit
Philadelphia → Detroit → Chicago O'Hare
Timetable, Detroit time
19:14DL 1391 from Philadelphia at the gate
00:30AA 6325 to Chicago O'Hare leaves the gate
5 h 16 apart on the timetable, overnight
The last days
DL 1391 and AA 6325 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.