AA 6280 then 5X 5603 at O'Hare
Marion → Chicago → Louisville
Timetable, Chicago time
07:36AA 6280 from Marion at the gate
07:305X 5603 to Louisville leaves the gate
23 h 54 apart on the timetable, overnight
5X 5603 leaves 23 h 54 after AA 6280 arrives on the timetable: more than half a day, so not a connection we count.