Travelling from most locations, it is best to book your flight to Athens during the month of January for the best deal, although there are other times of the year which offer great deals as well.
In general, most flyers find the cheapest time to book a flight to Athens is about 51 days prior.
On average, the cheapest flights to Athens are found when departing on a Wednesday. Try to avoid departing on a Saturday, as this is usually the most expensive day.
On average you can find the best deals on plane tickets to Athens when looking for flights with afternoon departure times.