AA 9909 then UA 2809 at O'Hare
Waterloo → Chicago → Dallas-Fort Worth
Timetable, Chicago time
17:10AA 9909 from Waterloo at the gate
10:40UA 2809 to Dallas-Fort Worth leaves the gate
17 h 30 apart on the timetable, overnight
UA 2809 leaves 17 h 30 after AA 9909 arrives on the timetable: more than half a day, so not a connection we count.