DL 2368 then AA 3547 at O'Hare
Los Angeles → Chicago → St Louis
Timetable, Chicago time
17:50DL 2368 from Los Angeles at the gate
16:50AA 3547 to St Louis leaves the gate
23 h apart on the timetable, overnight
AA 3547 leaves 23 h after DL 2368 arrives on the timetable: more than half a day, so not a connection we count.