Don't think that you need to learn some Greek before you get here. While a “hello” (yia sas) or “thank you” (efharisto) are welcome, most Athenians speak English. We often speak several other languages, too.
How to get from Athens airport to city center?
Metro Line 3 connects the airport to the city centre (Syntagma Square). The journey time is approximately 40 minutes. Trains run every 30 minutes, 7 days a week from 6:30 am to 11:30 pm. One way tickets cost €9 (€4.50 for children, teenagers, over 65), return tickets cost €16.