UA 5467 then AA 9912 at O'Hare
Charleston (South Carolina) → Chicago → Richmond
Timetable, Chicago time
10:11UA 5467 from Charleston (South Carolina) at the gate
07:30AA 9912 to Richmond leaves the gate
21 h 19 apart on the timetable, overnight
AA 9912 leaves 21 h 19 after UA 5467 arrives on the timetable: more than half a day, so not a connection we count.