AA 6486 then AA 1466 at O'Hare
Detroit → Chicago → Denver
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
15:23AA 1466 to Denver leaves the gate
21 h 54 apart on the timetable, overnight
AA 1466 leaves 21 h 54 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.