QR 7 then AA 9600 at Heathrow
Doha → London → Chicago
Timetable, London time
13:25QR 7 from Doha at the gate
13:00AA 9600 to Chicago leaves the gate
23 h 35 apart on the timetable, overnight
AA 9600 leaves 23 h 35 after QR 7 arrives on the timetable: more than half a day, so not a connection we count.