This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $307 fare is the cheapest current round-trip from Portland (PDX) to DTT on Frontier flight F91790, departing 2026-05-31 at 12:35 with return on 2026-06-07.

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