This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $139 fare is the cheapest current round-trip from Madrid (MAD) to BUH on W4 flight W43172, departing 2026-05-21 at 19:10 with return on 2026-05-25.

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