UA 3634 then AA 5227 at Charlotte
Washington → Charlotte → Birmingham (Alabama)
Timetable, Charlotte time
10:42UA 3634 from Washington at the gate
23:00AA 5227 to Birmingham (Alabama) leaves the gate
12 h 18 apart on the timetable
AA 5227 leaves 12 h 18 after UA 3634 arrives on the timetable: more than half a day, so not a connection we count.