WN 757 then UA 1964 at Denver
Cleveland → Denver → Las Vegas
Timetable, Denver time
18:45WN 757 from Cleveland at the gate
17:33UA 1964 to Las Vegas leaves the gate
22 h 48 apart on the timetable, overnight
UA 1964 leaves 22 h 48 after WN 757 arrives on the timetable: more than half a day, so not a connection we count.