This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $391 fare is the cheapest current round-trip from Portland (PDX) to KOA on Southwest flight WN3140, departing 2026-09-27 at 06:45 with return on 2026-10-04.

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