AA 3111 then OO 9912 at O'Hare
St Louis → Chicago → Richmond
Timetable, Chicago time
13:00AA 3111 from St Louis at the gate
07:30OO 9912 to Richmond leaves the gate
18 h 30 apart on the timetable, overnight
OO 9912 leaves 18 h 30 after AA 3111 arrives on the timetable: more than half a day, so not a connection we count.