AA 2486 then AA 5670 at Charlotte
St Louis → Charlotte → Lexington
Timetable, Charlotte time
16:49AA 2486 from St Louis at the gate
14:49AA 5670 to Lexington leaves the gate
22 h apart on the timetable, overnight
AA 5670 leaves 22 h after AA 2486 arrives on the timetable: more than half a day, so not a connection we count.