UA 2255 then WN 1666 at Denver
Hayden → Denver → Las Vegas
Timetable, Denver time
08:15UA 2255 from Hayden at the gate
20:50WN 1666 to Las Vegas leaves the gate
12 h 35 apart on the timetable
WN 1666 leaves 12 h 35 after UA 2255 arrives on the timetable: more than half a day, so not a connection we count.