AA 6445 then AA 5834 at Charlotte
Knoxville → Charlotte → Roanoke
Timetable, Charlotte time
18:43AA 6445 from Knoxville at the gate
18:34AA 5834 to Roanoke leaves the gate
23 h 51 apart on the timetable, overnight
AA 5834 leaves 23 h 51 after AA 6445 arrives on the timetable: more than half a day, so not a connection we count.