This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $437 fare is the cheapest current round-trip from Seattle (SEA) to WAS on Frontier flight F93406, departing 2026-08-05 at 14:22 with return on 2026-08-07.

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