AA 6128 then AA 1473 at Charlotte
Knoxville → Charlotte → Washington
Timetable, Charlotte time
10:21AA 6128 from Knoxville at the gate
22:30AA 1473 to Washington leaves the gate
12 h 09 apart on the timetable
AA 1473 leaves 12 h 09 after AA 6128 arrives on the timetable: more than half a day, so not a connection we count.