AA 9606 then BA 780 at Heathrow
Charlotte → London → Stockholm
Timetable, London time
07:20AA 9606 from Charlotte at the gate
13:35BA 780 to Stockholm leaves the gate
6 h 15 apart on the timetable
The last days
AA 9606 and BA 780 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.