This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $123 fare is the cheapest current round-trip from Denver (DEN) to SFO on Frontier flight F93439, departing 2026-08-20 at 22:29 with return on 2026-08-29.

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