This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $431 fare is the cheapest current round-trip from Montreal (YUL) to MEX on United Airlines flight UA3590, departing 2026-06-30 at 09:15 with return on 2026-08-11. Total flight time is not specified, with 1 stop routing.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count. Kiwi aggregates availability across the major GDSs and low-cost carrier inventories, and confirmation is instant once payment clears. Free cancellation typically available within 24 hours under most airline policies.

Prices on this route historically range $366–$733 depending on season, day of week, and booking lead time.