UA 3532 then AA 4930 at O'Hare
Knoxville → Chicago → Oklahoma City
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
16:15AA 4930 to Oklahoma City leaves the gate
21 h 32 apart on the timetable, overnight
AA 4930 leaves 21 h 32 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.