AA 4103 then OO 9912 at O'Hare
Detroit → Chicago → Richmond
Timetable, Chicago time
11:00AA 4103 from Detroit at the gate
07:30OO 9912 to Richmond leaves the gate
20 h 30 apart on the timetable, overnight
OO 9912 leaves 20 h 30 after AA 4103 arrives on the timetable: more than half a day, so not a connection we count.