UA 2370 then AA 529 at O'Hare
Sacramento → Chicago → Knoxville
Timetable, Chicago time
13:15UA 2370 from Sacramento at the gate
10:36AA 529 to Knoxville leaves the gate
21 h 21 apart on the timetable, overnight
AA 529 leaves 21 h 21 after UA 2370 arrives on the timetable: more than half a day, so not a connection we count.