AA 5198 then AA 5222 at Charlotte
Nashville → Charlotte → Washington
Timetable, Charlotte time
17:40AA 5198 from Nashville at the gate
17:15AA 5222 to Washington leaves the gate
23 h 35 apart on the timetable, overnight
AA 5222 leaves 23 h 35 after AA 5198 arrives on the timetable: more than half a day, so not a connection we count.