AA 4378 then DL 1556 at O'Hare
Northwest Arkansas → Chicago → Los Angeles
Timetable, Chicago time
08:45AA 4378 from Northwest Arkansas 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 4378 arrives on the timetable: more than half a day, so not a connection we count.