This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $143 fare is the cheapest current round-trip from Nice (NCE) to LON on Ryanair flight FR8497, departing 2026-07-23 at 22:35 with return on 2026-08-07.
Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.