This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $251 fare is the cheapest current round-trip from San Francisco (SFO) to DEN on Frontier flight F94306, departing 2026-07-17 at 22:23 with return on 2026-07-20.

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