AA 9785 then UA 3636 at O'Hare
Charlotte → Chicago → Knoxville
Timetable, Chicago time
07:57AA 9785 from Charlotte at the gate
07:07UA 3636 to Knoxville leaves the gate
23 h 10 apart on the timetable, overnight
UA 3636 leaves 23 h 10 after AA 9785 arrives on the timetable: more than half a day, so not a connection we count.