UA 4749 then AA 529 at O'Hare
Detroit → Chicago → Knoxville
Timetable, Chicago time
11:30UA 4749 from Detroit at the gate
10:36AA 529 to Knoxville leaves the gate
23 h 06 apart on the timetable, overnight
AA 529 leaves 23 h 06 after UA 4749 arrives on the timetable: more than half a day, so not a connection we count.