AA 2501 then DL 1556 at O'Hare
Newark → Chicago → Los Angeles
Timetable, Chicago time
08:44AA 2501 from Newark at the gate
07:45DL 1556 to Los Angeles leaves the gate
23 h 01 apart on the timetable, overnight
DL 1556 leaves 23 h 01 after AA 2501 arrives on the timetable: more than half a day, so not a connection we count.