AA 9602 then BA 480 at Heathrow
Dallas-Fort Worth → London → Barcelona
Timetable, London time
12:10AA 9602 from Dallas-Fort Worth at the gate
10:30BA 480 to Barcelona leaves the gate
22 h 20 apart on the timetable, overnight
BA 480 leaves 22 h 20 after AA 9602 arrives on the timetable: more than half a day, so not a connection we count.