AA 6486 then AA 2748 at O'Hare
Detroit → Chicago → Las Vegas
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
11:00AA 2748 to Las Vegas leaves the gate
17 h 31 apart on the timetable, overnight
AA 2748 leaves 17 h 31 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.