This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $307 fare is the cheapest current round-trip from Phoenix (PHX) to MKE on Frontier flight F91086, departing 2026-08-05 at 00:12 with return on 2026-08-18.

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