UA 3532 then AA 2570 at O'Hare
Knoxville → Chicago → Salt Lake City
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
14:00AA 2570 to Salt Lake City leaves the gate
19 h 17 apart on the timetable, overnight
AA 2570 leaves 19 h 17 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.