Take Metro Line 3 (Aghia Marina – Douk. Plakentias - Athens International Airport), which connects the Athens airport with the city center. Trains run every 30 minutes, 7 days a week from 6:30 a.m. to 11:30 p.m. The trip from/to the Airport to Syntagma station (Athens center) lasts 40 minutes. See the Metro timetable to the airport. From Syntagma change lines and take line 2 (terminal Anthoupoli). Omonoia is two stops away from Syntagma