AA 9909 then AA 3443 at O'Hare
Waterloo → Chicago → Rochester (ROC)
Timetable, Chicago time
17:10AA 9909 from Waterloo at the gate
12:00AA 3443 to Rochester (ROC) leaves the gate
18 h 50 apart on the timetable, overnight
AA 3443 leaves 18 h 50 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.