AA 2745 then QF 7550 at O'Hare
Las Vegas → Chicago → Los Angeles
Timetable, Chicago time
23:35AA 2745 from Las Vegas at the gate
23:15QF 7550 to Los Angeles leaves the gate
23 h 40 apart on the timetable, overnight
QF 7550 leaves 23 h 40 after AA 2745 arrives on the timetable: more than half a day, so not a connection we count.