This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $435 fare is the cheapest current round-trip from Guadalajara (GDL) to ONT on Y4 flight Y41860, departing 2026-07-18 at 20:59 with return on 2026-08-09.

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