My flight from Athens to Corfu lasted 1 hour and 10 minutes (left at 14:55). My return flight with the same airline (Ryanair) and same type of plane lasted about 45 minutes (left at 21:10).
Same thing with flight from Athens to Mytilini airport (50 minutes (morning) while return flight (night) was 35 minutes. Unfortunately I cannot remember flight details such as departure times and airline).
I generally see this happening in domestic flights in Greece.
Why does this happen?