AA 2574 then WN 149 at Phoenix
St Louis → Phoenix → Las Vegas
Timetable, Phoenix time
10:36AA 2574 from St Louis at the gate
08:35WN 149 to Las Vegas leaves the gate
21 h 59 apart on the timetable, overnight
WN 149 leaves 21 h 59 after AA 2574 arrives on the timetable: more than half a day, so not a connection we count.