AA 4523 then QF 7552 at O'Hare
Baltimore → Chicago → Los Angeles
Timetable, Chicago time
20:00AA 4523 from Baltimore at the gate
18:50QF 7552 to Los Angeles leaves the gate
22 h 50 apart on the timetable, overnight
QF 7552 leaves 22 h 50 after AA 4523 arrives on the timetable: more than half a day, so not a connection we count.