DL 763 then UA 457 at LAX
Atlanta → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
19:55DL 763 from Atlanta at the gate
12:40UA 457 to Chicago O'Hare leaves the gate
16 h 45 apart on the timetable, overnight
UA 457 leaves 16 h 45 after DL 763 arrives on the timetable: more than half a day, so not a connection we count.