This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $339 fare is the cheapest current round-trip from San Jose (SJC) to PHL on Southwest flight WN3607, departing 2026-08-23 at 23:00 with return on 2026-08-31.

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