This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $318 fare is the cheapest current round-trip from Denver (DEN) to SAN on Frontier flight F91747, departing 2026-06-25 at 06:45 with return on 2026-06-28.

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