This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $137 fare is the cheapest current round-trip from Athens (ATH) to BCN on W4 flight W45204, departing 2026-06-18 at 16:00 with return on 2026-07-08.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.