This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $450 fare is the cheapest current round-trip from Montreal (YUL) to MAD on Air Canada flight AC834, departing 2026-10-03 at 17:55 with return on 2026-10-24.

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