This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $210 fare is the cheapest current round-trip from Chicago (MDW) to SEA on Southwest flight WN4061, departing 2026-06-06 at 16:35 with return on 2026-06-21.

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