This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $447 fare is the cheapest current round-trip from San Diego (SAN) to KOA on United Airlines flight UA2428, departing 2026-05-31 at 11:44 with return on 2026-06-03.

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