This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $99 fare is the cheapest current round-trip from Madrid (MAD) to LON on W9 flight W95356, departing 2026-08-11 at 12:30 with return on 2026-08-14.

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