AA 5825 then UA 3455 at Charlotte
Knoxville → Charlotte → Chicago O'Hare
Timetable, Charlotte time
17:36AA 5825 from Knoxville at the gate
17:33UA 3455 to Chicago O'Hare leaves the gate
23 h 57 apart on the timetable, overnight
UA 3455 leaves 23 h 57 after AA 5825 arrives on the timetable: more than half a day, so not a connection we count.