AA 6486 then AA 2556 at O'Hare
Detroit → Chicago → San Diego
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
10:03AA 2556 to San Diego leaves the gate
16 h 34 apart on the timetable, overnight
AA 2556 leaves 16 h 34 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.