AA 1794 then UA 1079 at Charlotte
Nashville → Charlotte → Washington
Timetable, Charlotte time
07:45AA 1794 from Nashville at the gate
19:55UA 1079 to Washington leaves the gate
12 h 10 apart on the timetable
UA 1079 leaves 12 h 10 after AA 1794 arrives on the timetable: more than half a day, so not a connection we count.