AA 6486 then UA 762 at O'Hare
Detroit → Chicago → San Francisco
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
11:52UA 762 to San Francisco leaves the gate
18 h 23 apart on the timetable, overnight
UA 762 leaves 18 h 23 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.