AA 9909 then UA 3536 at O'Hare
Waterloo → Chicago → Louisville
Timetable, Chicago time
17:10AA 9909 from Waterloo at the gate
16:00UA 3536 to Louisville leaves the gate
22 h 50 apart on the timetable, overnight
UA 3536 leaves 22 h 50 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.