AA 1992 then AA 6018 at Charlotte
St Louis → Charlotte → Knoxville
Timetable, Charlotte time
13:14AA 1992 from St Louis at the gate
09:10AA 6018 to Knoxville leaves the gate
19 h 56 apart on the timetable, overnight
AA 6018 leaves 19 h 56 after AA 1992 arrives on the timetable: more than half a day, so not a connection we count.