AA 2975 then UA 3598 at O'Hare
Minneapolis → Chicago → Louisville
Timetable, Chicago time
18:18AA 2975 from Minneapolis at the gate
18:10UA 3598 to Louisville leaves the gate
23 h 52 apart on the timetable, overnight
UA 3598 leaves 23 h 52 after AA 2975 arrives on the timetable: more than half a day, so not a connection we count.