UA 4397 then AA 9912 at O'Hare
Columbia Metropolitan → Chicago → Richmond
Timetable, Chicago time
11:59UA 4397 from Columbia Metropolitan at the gate
07:30AA 9912 to Richmond leaves the gate
19 h 31 apart on the timetable, overnight
AA 9912 leaves 19 h 31 after UA 4397 arrives on the timetable: more than half a day, so not a connection we count.