WN 262 then UA 489 at Denver
Las Vegas → Denver → Houston
Timetable, Denver time
17:40WN 262 from Las Vegas at the gate
15:35UA 489 to Houston leaves the gate
21 h 55 apart on the timetable, overnight
UA 489 leaves 21 h 55 after WN 262 arrives on the timetable: more than half a day, so not a connection we count.