The cheapest flight to Sofia you can get by boooking 52 days before departure.
The most popular airlines on the route Athens - Sofia: Ryanair (FR), Aegean (A3), Bulgaria Air (FB).
The cheapest flights you can book on the route Eleftherios Venizelos (ATH) - Sofia Airport (SOF).
Direct flights last about 1h 8min.
Direct flights available 7 days a week.
Direct flights: Ryanair (FR), Aegean (A3), Bulgaria Air (FB).