This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $517 fare is the cheapest current round-trip from Guadalajara (GDL) to STL on Y4 flight Y41760, departing 2026-07-07 at 07:58 with return on 2026-07-09.

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