UA 2774 then AA 529 at O'Hare
Washington National → Chicago → Knoxville
Timetable, Chicago time
11:42UA 2774 from Washington National at the gate
10:36AA 529 to Knoxville leaves the gate
22 h 54 apart on the timetable, overnight
AA 529 leaves 22 h 54 after UA 2774 arrives on the timetable: more than half a day, so not a connection we count.