This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $135 fare is the cheapest current round-trip from Houston (IAH) to MEX on Y4 flight Y4731, departing 2026-09-05 at 20:55 with return on 2026-09-19.

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