AA 9785 then DL 1556 at O'Hare
Charlotte → Chicago → Los Angeles
Timetable, Chicago time
07:57AA 9785 from Charlotte at the gate
07:45DL 1556 to Los Angeles leaves the gate
23 h 48 apart on the timetable, overnight
DL 1556 leaves 23 h 48 after AA 9785 arrives on the timetable: more than half a day, so not a connection we count.