AA 3879 then WN 149 at Phoenix
Memphis → Phoenix → Las Vegas
Timetable, Phoenix time
09:18AA 3879 from Memphis at the gate
08:35WN 149 to Las Vegas leaves the gate
23 h 17 apart on the timetable, overnight
WN 149 leaves 23 h 17 after AA 3879 arrives on the timetable: more than half a day, so not a connection we count.