This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $315 fare is the cheapest current round-trip from Minneapolis (MSP) to SEA on Frontier flight F91149, departing 2026-08-13 at 22:12 with return on 2026-08-16.

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