This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $438 fare is the cheapest current round-trip from Porto (OPO) to VIE on YW flight YW1154, departing 2026-08-18 at 20:40 with return on 2026-08-23.

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