This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $174 fare is the cheapest current round-trip from Seattle (SEA) to ONT on Frontier flight F92276, departing 2026-08-24 at 11:54 with return on 2026-08-28.

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