A3 313 then BA 633 at Athens
Heraklion → Athens → London Heathrow
Timetable, Athens time
07:20A3 313 from Heraklion at the gate
16:25BA 633 to London Heathrow leaves the gate
9 h 05 apart on the timetable
The last days
A3 313 and BA 633 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.