This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $335 fare is the cheapest current round-trip from Philadelphia (PHL) to SDQ on Frontier flight F9181, departing 2026-06-26 at 07:15 with return on 2026-07-11.

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