This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $273 fare is the cheapest current round-trip from Phoenix (PHX) to BOS on Frontier flight F92608, departing 2026-09-25 at 22:44 with return on 2026-10-07.

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