UA 3532 then AA 3346 at O'Hare
Knoxville → Chicago → Madison
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
17:23AA 3346 to Madison leaves the gate
22 h 40 apart on the timetable, overnight
AA 3346 leaves 22 h 40 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.