UA 1850 then DL 2253 at LAX
Denver → Los Angeles → Las Vegas
Timetable, Los Angeles time
07:36UA 1850 from Denver at the gate
07:35DL 2253 to Las Vegas leaves the gate
23 h 59 apart on the timetable, overnight
DL 2253 leaves 23 h 59 after UA 1850 arrives on the timetable: more than half a day, so not a connection we count.