This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $243 fare is the cheapest current round-trip from Calgary (YYC) to SEA on Air Canada flight AC203, departing 2026-06-25 at 07:00 with return on 2026-06-27.

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