UA 1653 then AA 529 at O'Hare
Savannah → Chicago → Knoxville
Timetable, Chicago time
13:09UA 1653 from Savannah at the gate
10:36AA 529 to Knoxville leaves the gate
21 h 27 apart on the timetable, overnight
AA 529 leaves 21 h 27 after UA 1653 arrives on the timetable: more than half a day, so not a connection we count.