This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $305 fare is the cheapest current round-trip from Seattle (SEA) to SAN on Frontier flight F93406, departing 2026-06-11 at 15:33 with return on 2026-06-15.

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