In case you have an Airport Arrival transfer upon exit customs look for your driver holding a sign under your name in front of your gate. Athens Shuttle bus service Airport - Hotel - Airport operates every 2 hours on a daily basis starting from 09:00 and then 11:00-13:00-15:00-17:00-19:00-20:00 on the hour, Airport-Hotel-Airport. Service is available only for Athens City Centre Hotels and not for the Athens Coastline or Piraeus.
We (2 people) paid 45 Swiss Francs (= 45 US dollars) for this service but didn't use it. What I didn't notice in the small print was that it runs at 2 hour intervals. That's not exactly convenient. Instead we took the local bus (X95) which stops outside the international…