AirHint found the following cheapest return flights from London (LHR) to Calgary (YYC) in August 2026 (see full year).

Return flights

25 Aug - 08 Sep	KLM
26 Aug - 07 Sep	KLM
23 Aug - 06 Sep	KLM
31 Aug - 07 Sep	KLM
30 Aug - 13 Sep	KLM
28 Aug - 06 Sep	Finnair
29 Aug - 05 Sep	KLM
29 Aug - 06 Sep	Air France
27 Aug - 10 Sep	British Airways
29 Aug - 11 Sep	British Airways
20 Aug - 24 Aug	Virgin Atlantic
27 Aug - 31 Aug	Virgin Atlantic
20 Aug - 31 Aug	Virgin Atlantic
20 Aug - 30 Aug	Virgin Atlantic
21 Aug - 30 Aug	Scandinavian Airlines
20 Aug - 27 Aug	KLM
24 Aug - 31 Aug	KLM
17 Aug - 30 Aug	Scandinavian Airlines
03 Aug - 09 Aug	Aer Lingus
11 Aug - 25 Aug	British Airways

Also check the deals for one-way 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 return flights from London to Calgary in August from 644€

Return flights