AA 6486 then UA 4452 at O'Hare
Detroit → Chicago → Richmond
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
11:00UA 4452 to Richmond leaves the gate
17 h 31 apart on the timetable, overnight
UA 4452 leaves 17 h 31 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.