AA 9909 then UA 3645 at O'Hare
Waterloo → Chicago → Cleveland
Timetable, Chicago time
17:10AA 9909 from Waterloo at the gate
13:00UA 3645 to Cleveland leaves the gate
19 h 50 apart on the timetable, overnight
UA 3645 leaves 19 h 50 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.