UA 3532 then AA 2769 at O'Hare
Knoxville → Chicago → Washington National
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
16:51AA 2769 to Washington National leaves the gate
22 h 08 apart on the timetable, overnight
AA 2769 leaves 22 h 08 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.