The cheapest flight to Athens you can get by boooking just before departure.
The most popular airlines on the route Barcelona - Athens: Turkish Airlines (TK), Iberia (IB), Alitalia (AZ).
The cheapest flights you can book on the route El Prat (BCN) - Eleftherios Venizelos (ATH).
Direct flights last about 2h 50min.
Direct flights available 5 days a week - Monday, Thursday, Friday, Saturday, Sunday.
Direct flights: Aegean (A3), Iberia (IB), Vueling (VY).