AA 3996 then WN 149 at Phoenix
Tucson → Phoenix → Las Vegas
Timetable, Phoenix time
15:46AA 3996 from Tucson at the gate
08:35WN 149 to Las Vegas leaves the gate
16 h 49 apart on the timetable, overnight
WN 149 leaves 16 h 49 after AA 3996 arrives on the timetable: more than half a day, so not a connection we count.