Greek Railways (OSE) operates a train from Eretria to Athens every 3 hours. Tickets cost $4 - $5 and the journey takes 44 min. Alternatively, KTEL Evias operates a bus from Eretria to Athens every 4 hours, and the journey takes 34 min. KTEL Evias also services this route hourly.
From Eretria taxi to Sfendali then train to Athens. 1 h 25 min 59€. From Eretria bus to Chalcis then bus to Athens KTEL Liosion. 2 h 28 min. From Eretria taxi to Athens. 1 h 6 min 93€. From Eretria drive to Athens. 1 h 6 min 14€.