UA 2329 then AA 529 at O'Hare
Denver → Chicago → Knoxville
Timetable, Chicago time
13:13UA 2329 from Denver at the gate
10:36AA 529 to Knoxville leaves the gate
21 h 23 apart on the timetable, overnight
AA 529 leaves 21 h 23 after UA 2329 arrives on the timetable: more than half a day, so not a connection we count.