AA 9602 then BA 506 at Heathrow
Dallas-Fort Worth → London → Lisbon
Timetable, London time
12:10AA 9602 from Dallas-Fort Worth at the gate
11:55BA 506 to Lisbon leaves the gate
23 h 45 apart on the timetable, overnight
BA 506 leaves 23 h 45 after AA 9602 arrives on the timetable: more than half a day, so not a connection we count.