This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $590 fare is the cheapest current round-trip from Philadelphia (PHL) to AUA on Frontier flight F91003, departing 2026-08-29 at 16:45 with return on 2026-09-05.

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