AA 2907 then DL 1556 at O'Hare
New York JFK → Chicago → Los Angeles
Timetable, Chicago time
09:05AA 2907 from New York JFK at the gate
07:45DL 1556 to Los Angeles leaves the gate
22 h 40 apart on the timetable, overnight
DL 1556 leaves 22 h 40 after AA 2907 arrives on the timetable: more than half a day, so not a connection we count.