AA 9602 then BA 812 at Heathrow
Dallas-Fort Worth → London → Copenhagen
Timetable, London time
12:10AA 9602 from Dallas-Fort Worth at the gate
11:20BA 812 to Copenhagen leaves the gate
23 h 10 apart on the timetable, overnight
BA 812 leaves 23 h 10 after AA 9602 arrives on the timetable: more than half a day, so not a connection we count.