SM 3103 then BA 487 at Barcelona
Cairo → Barcelona → London Heathrow
Timetable, Barcelona time
12:20SM 3103 from Cairo at the gate
18:20BA 487 to London Heathrow leaves the gate
6 h apart on the timetable
The last days
SM 3103 and BA 487 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.