This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $169 fare is the cheapest current round-trip from Chicago (MDW) to PHL on Southwest flight WN1573, departing 2026-09-26 at 11:45 with return on 2026-09-29.

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