AA 2489 then DL 1556 at O'Hare
Baltimore → Chicago → Los Angeles
Timetable, Chicago time
08:45AA 2489 from Baltimore at the gate
07:45DL 1556 to Los Angeles leaves the gate
23 h apart on the timetable, overnight
DL 1556 leaves 23 h after AA 2489 arrives on the timetable: more than half a day, so not a connection we count.