AA 1271 then AA 1927 at Charlotte
Cincinnati → Charlotte → Las Vegas
Timetable, Charlotte time
07:50AA 1271 from Cincinnati at the gate
07:30AA 1927 to Las Vegas leaves the gate
23 h 40 apart on the timetable, overnight
AA 1927 leaves 23 h 40 after AA 1271 arrives on the timetable: more than half a day, so not a connection we count.