This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $137 fare is the cheapest current round-trip from Frankfurt (FRA) to MAD on Ryanair flight FR4392, departing 2026-09-12 at 20:40 with return on 2026-09-14.

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