AA 3484 then QF 7552 at O'Hare
St Louis → Chicago → Los Angeles
Timetable, Chicago time
19:05AA 3484 from St Louis at the gate
18:50QF 7552 to Los Angeles leaves the gate
23 h 45 apart on the timetable, overnight
QF 7552 leaves 23 h 45 after AA 3484 arrives on the timetable: more than half a day, so not a connection we count.