UA 2610 then DL 1634 at LAX
San Francisco → Los Angeles → Chicago O'Hare
Timetable, Los Angeles time
15:35UA 2610 from San Francisco at the gate
15:00DL 1634 to Chicago O'Hare leaves the gate
23 h 25 apart on the timetable, overnight
DL 1634 leaves 23 h 25 after UA 2610 arrives on the timetable: more than half a day, so not a connection we count.