This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $665 fare is the cheapest current round-trip from Calgary (YYC) to LON on WestJet flight WS24, departing 2026-07-15 at 19:00 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.