Originally Posted by
CitySlacker
The first three letters of the cancellation code are the reason. The fourth letter is Y (Yes) or N (No) to note whether it's eligible for EC261 compensation. OPEY means "Operational Yes."
That's very useful information to know for sure. Who decides the cancellation code (Y or N for compensation)? Is it a BA code/airport generated/something else? Or is this just that it's theoretically available for compensation due to route and length of delay?