UA 3532 then AA 1782 at O'Hare
Knoxville → Chicago → Orlando
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
12:48AA 1782 to Orlando leaves the gate
18 h 05 apart on the timetable, overnight
AA 1782 leaves 18 h 05 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.