This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $426 fare is the cheapest current round-trip from Toronto (YYZ) to BOS on PD flight PD617, departing 2026-06-29 at 15:55 with return on 2026-06-30.

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