WN 262 then UA 421 at Denver
Las Vegas → Denver → Washington
Timetable, Denver time
17:40WN 262 from Las Vegas at the gate
16:10UA 421 to Washington leaves the gate
22 h 30 apart on the timetable, overnight
UA 421 leaves 22 h 30 after WN 262 arrives on the timetable: more than half a day, so not a connection we count.