AA 1673 then AA 3980 at Detroit
Phoenix → Detroit → Chicago O'Hare
Timetable, Detroit time
15:57AA 1673 from Phoenix at the gate
16:54AA 3980 to Chicago O'Hare leaves the gate
57 min apart on the timetable
The last days
AA 1673 and AA 3980 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.