AA 6486 then UA 5693 at O'Hare
Detroit → Chicago → Knoxville
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
14:07UA 5693 to Knoxville leaves the gate
20 h 38 apart on the timetable, overnight
UA 5693 leaves 20 h 38 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.