This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $551 fare is the cheapest current round-trip from Austin (AUS) to BOI on Frontier flight F92047, departing 2026-07-22 at 14:25 with return on 2026-07-25.

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