AA 1424 then AA 3544 at Detroit
Phoenix → Detroit → Chicago O'Hare
Timetable, Detroit time
15:32AA 1424 from Phoenix at the gate
16:28AA 3544 to Chicago O'Hare leaves the gate
56 min apart on the timetable
The last days
AA 1424 and AA 3544 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.