AA 1439 then AA 2431 at Charlotte
Detroit → Charlotte → Philadelphia
Timetable, Charlotte time
09:14AA 1439 from Detroit at the gate
10:03AA 2431 to Philadelphia leaves the gate
49 min apart on the timetable
The last days
AA 1439 and AA 2431 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.