This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $291 fare is the cheapest current round-trip from Denver (DEN) to SEA on Frontier flight F94545, departing 2026-07-31 at 07:13 with return on 2026-08-02.

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