AA 1610 then AA 6445 at Charlotte
Denver → Charlotte → Knoxville
Timetable, Charlotte time
16:29AA 1610 from Denver at the gate
15:35AA 6445 to Knoxville leaves the gate
23 h 06 apart on the timetable, overnight
AA 6445 leaves 23 h 06 after AA 1610 arrives on the timetable: more than half a day, so not a connection we count.