DL 763 then UA 2487 at LAX
Atlanta → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
19:55DL 763 from Atlanta at the gate
14:21UA 2487 to Chicago O'Hare leaves the gate
18 h 26 apart on the timetable, overnight
UA 2487 leaves 18 h 26 after DL 763 arrives on the timetable: more than half a day, so not a connection we count.