UA 3532 then AA 2499 at O'Hare
Knoxville → Chicago → Dallas-Fort Worth
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
17:16AA 2499 to Dallas-Fort Worth leaves the gate
22 h 33 apart on the timetable, overnight
AA 2499 leaves 22 h 33 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.