This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $317 fare is the cheapest current round-trip from Seattle (SEA) to KOA on Alaska Airlines flight AS256, departing 2026-05-18 at 11:29 with return on 2026-06-22.

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