AA 3951 then WN 149 at Phoenix
Tucson → Phoenix → Las Vegas
Timetable, Phoenix time
17:08AA 3951 from Tucson at the gate
08:35WN 149 to Las Vegas leaves the gate
15 h 27 apart on the timetable, overnight
WN 149 leaves 15 h 27 after AA 3951 arrives on the timetable: more than half a day, so not a connection we count.