This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $273 fare is the cheapest current round-trip from Calgary (YYC) to SEA on WestJet flight WS1552, departing 2026-07-16 at 17:50 with return on 2026-07-21.

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