UA 1853 then DL 1634 at LAX
Cleveland → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
20:27UA 1853 from Cleveland at the gate
17:59DL 1634 to Chicago O'Hare leaves the gate
21 h 32 apart on the timetable, overnight
DL 1634 leaves 21 h 32 after UA 1853 arrives on the timetable: more than half a day, so not a connection we count.