This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $389 fare is the cheapest current round-trip from San Jose (SJC) to BOS on Alaska Airlines flight AS3211, departing 2026-08-15 at 17:02 with return on 2026-08-18.

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