UA 474 then QF 7552 at O'Hare
Mexico City → Chicago → Los Angeles
Timetable, Chicago time
19:34UA 474 from Mexico City at the gate
18:50QF 7552 to Los Angeles leaves the gate
23 h 16 apart on the timetable, overnight
QF 7552 leaves 23 h 16 after UA 474 arrives on the timetable: more than half a day, so not a connection we count.