AA 2991 then AA 1683 at Charlotte
Newark → Charlotte → Detroit
Timetable, Charlotte time
08:05AA 2991 from Newark at the gate
11:20AA 1683 to Detroit leaves the gate
3 h 15 apart on the timetable
The last days
AA 2991 and AA 1683 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.