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

One-Way flights

29 Aug	British Airways
28 Aug	Aer Lingus
19 Aug	Vueling Airlines
22 Aug	Icelandair
18 Aug	British Airways
27 Aug	Vueling Airlines
14 Aug	British Airways
20 Aug	British Airways
17 Aug	Aer Lingus
13 Aug	Aer Lingus

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 349€

One-Way flights