This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $260 fare is the cheapest current round-trip from San Francisco (SFO) to SEA on Alaska Airlines flight AS630, departing 2026-07-21 at 12:27 with return on 2026-07-25.

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