WN 262 then UA 779 at Denver
Las Vegas → Denver → Boston
Timetable, Denver time
17:40WN 262 from Las Vegas at the gate
15:40UA 779 to Boston leaves the gate
22 h apart on the timetable, overnight
UA 779 leaves 22 h after WN 262 arrives on the timetable: more than half a day, so not a connection we count.