UA 3520 then AA 529 at O'Hare
Louisville → Chicago → Knoxville
Timetable, Chicago time
11:22UA 3520 from Louisville at the gate
10:36AA 529 to Knoxville leaves the gate
23 h 14 apart on the timetable, overnight
AA 529 leaves 23 h 14 after UA 3520 arrives on the timetable: more than half a day, so not a connection we count.