AA 9608 then BA 1458 at Heathrow
Dallas-Fort Worth → London → Edinburgh
Timetable, London time
08:15AA 9608 from Dallas-Fort Worth at the gate
17:10BA 1458 to Edinburgh leaves the gate
8 h 55 apart on the timetable
The last days
AA 9608 and BA 1458 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.