DL 2368 then AA 1819 at O'Hare
Los Angeles → Chicago → Pittsburgh
Timetable, Chicago time
17:50DL 2368 from Los Angeles at the gate
16:59AA 1819 to Pittsburgh leaves the gate
23 h 09 apart on the timetable, overnight
AA 1819 leaves 23 h 09 after DL 2368 arrives on the timetable: more than half a day, so not a connection we count.