AA 6501 then DL 1556 at O'Hare
Nashville → Chicago → Los Angeles
Timetable, Chicago time
08:35AA 6501 from Nashville at the gate
07:45DL 1556 to Los Angeles leaves the gate
23 h 10 apart on the timetable, overnight
DL 1556 leaves 23 h 10 after AA 6501 arrives on the timetable: more than half a day, so not a connection we count.