UA 3532 then AA 3420 at O'Hare
Knoxville → Chicago → Omaha
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
17:29AA 3420 to Omaha leaves the gate
22 h 46 apart on the timetable, overnight
AA 3420 leaves 22 h 46 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.