UA 3532 then AA 4156 at O'Hare
Knoxville → Chicago → Green Bay
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
13:00AA 4156 to Green Bay leaves the gate
18 h 17 apart on the timetable, overnight
AA 4156 leaves 18 h 17 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.