This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $320 fare is the cheapest current round-trip from Chicago (ORD) to MEX on Frontier flight F93135, departing 2026-08-04 at 17:46 with return on 2026-08-11.

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