QR 20 then AA 529 at O'Hare
Doha → Chicago → Knoxville
Timetable, Chicago time
13:42QR 20 from Doha at the gate
10:36AA 529 to Knoxville leaves the gate
20 h 54 apart on the timetable, overnight
AA 529 leaves 20 h 54 after QR 20 arrives on the timetable: more than half a day, so not a connection we count.