UA 5920 then AA 529 at O'Hare
Saginaw → Chicago → Knoxville
Timetable, Chicago time
13:59UA 5920 from Saginaw at the gate
10:36AA 529 to Knoxville leaves the gate
20 h 37 apart on the timetable, overnight
AA 529 leaves 20 h 37 after UA 5920 arrives on the timetable: more than half a day, so not a connection we count.