AA 4038 then AA 5004 at O'Hare
Madison → Chicago → Detroit
Timetable, Chicago time
16:44AA 4038 from Madison at the gate
19:00AA 5004 to Detroit leaves the gate
2 h 16 apart on the timetable
The last days
AA 4038 and AA 5004 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.