This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $365 fare is the cheapest current round-trip from San Jose (SJC) to COS on Southwest flight WN3668, departing 2026-07-16 at 14:35 with return on 2026-07-21.

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