This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $149 fare is the cheapest current round-trip from San Diego (SAN) to BOI on Southwest flight WN409, departing 2026-05-24 at 07:20 with return on 2026-05-31.

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