UA 6209 then AA 5174 at Charlotte
Washington → Charlotte → Dayton
Timetable, Charlotte time
18:57UA 6209 from Washington at the gate
17:42AA 5174 to Dayton leaves the gate
22 h 45 apart on the timetable, overnight
AA 5174 leaves 22 h 45 after UA 6209 arrives on the timetable: more than half a day, so not a connection we count.