UA 1689 then DL 1634 at LAX
Washington → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
15:32UA 1689 from Washington at the gate
15:00DL 1634 to Chicago O'Hare leaves the gate
23 h 28 apart on the timetable, overnight
DL 1634 leaves 23 h 28 after UA 1689 arrives on the timetable: more than half a day, so not a connection we count.