This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $40 fare is the cheapest current round-trip from Sofia (SOF) to WAW on Ryanair flight FR4036, departing 2026-09-18 at 16:40 with return on 2026-09-21.

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