This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $378 fare is the cheapest current round-trip from Minneapolis (MSP) to BOS on Sun Country flight SY251, departing 2026-06-23 at 06:55 with return on 2026-06-24.

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