WN 4968 then WN 1722 at Phoenix
Tucson → Phoenix → Las Vegas
Timetable, Phoenix time
06:50WN 4968 from Tucson at the gate
21:55WN 1722 to Las Vegas leaves the gatealso WN 8823
15 h 05 apart on the timetable
WN 1722 leaves 15 h 05 after WN 4968 arrives on the timetable: more than half a day, so not a connection we count.