UA 3532 then AA 6445 at O'Hare
Knoxville → Chicago → Kalamazoo
Timetable, Chicago time
18:43UA 3532 from Knoxville at the gate
14:35AA 6445 to Kalamazoo leaves the gate
19 h 52 apart on the timetable, overnight
AA 6445 leaves 19 h 52 after UA 3532 arrives on the timetable: more than half a day, so not a connection we count.