This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $310 fare is the cheapest current round-trip from Dublin (DUB) to LIS on Aer Lingus flight EI740, departing 2026-06-20 at 18:25 with return on 2026-06-23.

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