AA 78 then BA 746 at Heathrow
Dallas-Fort Worth → London → Geneva
Timetable, London time
12:10AA 78 from Dallas-Fort Worth at the gate
10:30BA 746 to Geneva leaves the gate
22 h 20 apart on the timetable, overnight
BA 746 leaves 22 h 20 after AA 78 arrives on the timetable: more than half a day, so not a connection we count.