This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $126 fare is the cheapest current round-trip from Phoenix (PHX) to SFO on Frontier flight F91191, departing 2026-07-15 at 14:02 with return on 2026-07-15.

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