QR 8164 then AA 73 at O'Hare
Liege → Chicago → Buffalo
Timetable, Chicago time
13:00QR 8164 from Liege at the gate
07:00AA 73 to Buffalo leaves the gate
18 h apart on the timetable, overnight
AA 73 leaves 18 h after QR 8164 arrives on the timetable: more than half a day, so not a connection we count.