UA 3532 then AA 3664 at O'Hare
Knoxville → Chicago → Columbus (Ohio)
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
15:29AA 3664 to Columbus (Ohio) leaves the gate
20 h 46 apart on the timetable, overnight
AA 3664 leaves 20 h 46 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.