The best way to get to the airport from downtown Athens is by metro or light rail. Single tickets cost EUR 6 and include transfers (within 90 minutes of the ticket's initial validation; don't forget to validate the ticket again) to bus, trolley, or tram. Combined tickets for two (EUR 10) and three (EUR 15) passengers are also available; if you're making a stopover in Athens, opt for a round-trip ticket (EUR 10), valid for trips to and from the airport made during a single 48-hour period.
In Athens three reliable express buses connect the airport with the metro (Ethniki Amyna station), Syntagma Square, and Piraeus. These buses are air-conditioned and have space for luggage. Express buses leave the arrivals level of the airport every 10 minutes and operate 24 hours a day. Bus E95 will take you to Syntagma Square (Amalias avenue); E94 goes to the bus terminus at the Ethniki Amyna metro stop (Line 3), which will get you into Syntagma within 10 minutes. Bus E96 takes the Vari-Koropi road inland and links with the coastal road, passing through Voula, Glyfada, and Alimo; it then goes on to Piraeus (opposite Karaiskaki Square).
The Attiki Odos and the expansion of the city's network of bus lanes has made travel times more predictable, and on a good day the E94 can get you to Ethniki Amyna in 40 minutes. Tickets to and from the airport cost EUR 2.90 and are valid on all forms of transportation in Athens for 24 hours from the time of validation. Purchase tickets from the airport terminal, kiosks, metro stations, or even on the express buses. The Greek National Tourism Organization (GNTO, or EOT in Greece) dispenses schedules. You can also obtain brochures at the airport with bus schedules and routes.
Taxis are readily available at the arrivals level of the Athens airport; it costs an average of EUR 22 to get into downtown Athens (including tolls). Limousine Service and Royal Prestige Limousine Service provide service to and from Athens; an evening surcharge of up to 50% often applies, and you should call in advance. Prices start at EUR 80 for one-way transfer from the airport to a central hotel.
Limousine Service. Royal Prestige Limousine Service.