This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $256 fare is the cheapest current round-trip from Toronto (YYZ) to BOS on Air Canada flight AC764, departing 2026-08-06 at 20:55 with return on 2026-08-10.

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