AA 1992 then UA 3441 at Charlotte
St Louis → Charlotte → Washington
Timetable, Charlotte time
13:29AA 1992 from St Louis at the gate
10:24UA 3441 to Washington leaves the gate
20 h 55 apart on the timetable, overnight
UA 3441 leaves 20 h 55 after AA 1992 arrives on the timetable: more than half a day, so not a connection we count.