This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $99 fare is the cheapest current round-trip from Budapest (BUD) to BCN on W4 flight W42335, departing 2026-09-15 at 21:55 with return on 2026-09-17.

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