This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $301 fare is the cheapest current round-trip from Minneapolis (MSP) to BOS on Southwest flight WN3470, departing 2026-05-15 at 17:20 with return on 2026-05-19.

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