AirHint found the following cheapest one-way flights from London (LHR) to Calgary (YYC) in August 2025 (see full year).

One-Way flights

18 Aug	Scandinavian Airlines
25 Aug	British Airways
26 Aug	Icelandair
19 Aug	Vueling Airlines
29 Aug	British Airways
27 Aug	Vueling Airlines
28 Aug	Aer Lingus
11 Aug	Scandinavian Airlines
22 Aug	Scandinavian Airlines
24 Aug	British Airways

Also check the deals for return flights from London to Calgary in August.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from London to Calgary in August from $372

One-Way flights