This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $101 fare is the cheapest current round-trip from Bucharest (OTP) to BCN on W4 flight W43177, departing 2026-10-20 at 18:20 with return on 2026-10-23.

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