AA 9909 then WN 2278 at Phoenix
Salt Lake City → Phoenix → Las Vegas
Timetable, Phoenix time
14:30AA 9909 from Salt Lake City at the gate
12:55WN 2278 to Las Vegas leaves the gate
22 h 25 apart on the timetable, overnight
WN 2278 leaves 22 h 25 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.