This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $336 fare is the cheapest current round-trip from Zagreb (ZAG) to BCN on OU flight OU374, departing 2026-05-07 at 15:20 with return on 2026-05-09.

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