AA 2748 then QF 7552 at O'Hare
Las Vegas → Chicago → Los Angeles
Timetable, Chicago time
20:07AA 2748 from Las Vegas at the gate
18:50QF 7552 to Los Angeles leaves the gate
22 h 43 apart on the timetable, overnight
QF 7552 leaves 22 h 43 after AA 2748 arrives on the timetable: more than half a day, so not a connection we count.