This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $123 fare is the cheapest current round-trip from Atlanta (ATL) to DEN on Frontier flight F91449, departing 2026-09-11 at 06:41 with return on 2026-09-13.

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