British Airways used to be a pleasant, professional, comfortable and reliable flying experience. Even though it was slightly more pricey than the other airlines, we would always prefer to use it. In recent years its service has deteriorated continually to the extent that its passenger service is, in our opinion, now unacceptable. In May and June this year my family and I, separately, flew on three different return flights from Heathrow to Athens, six flights in all. Out of those six flights only one flight was close to its promised time (ie more than 80% of flights delayed), ending with the last flight that my husband and I were on, from Athens to Heathrow, being four hours late. This flight was the return flight from Heathrow to Athens, which took off over half an hour late originally - inexcusable because it was the first flight of the day at 0650. Due to this delay the flight was unable to land in Athens, because of an apparent electric storm, and was diverted to Heraklion. However, had the flight from Heathrow to Athens taken off on time then this further delay could have been completely avoided. The most important aspect of an economy flight is that it arrives on time and people can put up with a certain amount of discomfort in order to achieve this. Sadly, we will seriously have to consider using other airlines in future.