This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $141 fare is the cheapest current round-trip from Chicago (MDW) to PHL on Frontier flight F91887, departing 2026-05-01 at 15:29 with return on 2026-05-03.

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