UA 2835 then WN 1722 at Phoenix
Houston → Phoenix → Las Vegas
Timetable, Phoenix time
09:30UA 2835 from Houston at the gate
21:55WN 1722 to Las Vegas leaves the gate
12 h 25 apart on the timetable
WN 1722 leaves 12 h 25 after UA 2835 arrives on the timetable: more than half a day, so not a connection we count.