AA 6486 then UA 8137 at O'Hare
Detroit → Chicago → Los Angeles
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
13:50UA 8137 to Los Angeles leaves the gate
20 h 21 apart on the timetable, overnight
UA 8137 leaves 20 h 21 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.