AA 1260 then QF 7552 at O'Hare
Boston → Chicago → Los Angeles
Timetable, Chicago time
18:55AA 1260 from Boston at the gate
18:50QF 7552 to Los Angeles leaves the gate
23 h 55 apart on the timetable, overnight
QF 7552 leaves 23 h 55 after AA 1260 arrives on the timetable: more than half a day, so not a connection we count.