UA 3532 then AA 9911 at O'Hare
Knoxville → Chicago → Dallas-Fort Worth
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
16:00AA 9911 to Dallas-Fort Worth leaves the gate
21 h 17 apart on the timetable, overnight
AA 9911 leaves 21 h 17 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.