B6 811 then QF 7552 at O'Hare
Boston → Chicago → Los Angeles
Timetable, Chicago time
19:17B6 811 from Boston at the gate
18:50QF 7552 to Los Angeles leaves the gate
23 h 33 apart on the timetable, overnight
QF 7552 leaves 23 h 33 after B6 811 arrives on the timetable: more than half a day, so not a connection we count.