AA 2486 then AA 1454 at Charlotte
St Louis → Charlotte → Las Vegas
Timetable, Charlotte time
16:49AA 2486 from St Louis at the gate
16:08AA 1454 to Las Vegas leaves the gate
23 h 19 apart on the timetable, overnight
AA 1454 leaves 23 h 19 after AA 2486 arrives on the timetable: more than half a day, so not a connection we count.