This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $180 fare is the cheapest current round-trip from Phoenix (PHX) to BIL on Frontier flight F94113, departing 2026-08-20 at 22:30 with return on 2026-08-28.

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