UA 482 then DL 1556 at O'Hare
Philadelphia → Chicago → Los Angeles
Timetable, Chicago time
07:50UA 482 from Philadelphia at the gate
07:45DL 1556 to Los Angeles leaves the gate
23 h 55 apart on the timetable, overnight
DL 1556 leaves 23 h 55 after UA 482 arrives on the timetable: more than half a day, so not a connection we count.