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

Return flights

24 Aug - 14 Sep	KLM
27 Aug - 06 Sep	KLM
27 Aug - 07 Sep	KLM
25 Aug - 08 Sep	KLM
27 Aug - 12 Sep	KLM
21 Aug - 06 Sep	KLM
23 Aug - 05 Sep	KLM
31 Aug - 19 Sep	KLM
23 Aug - 07 Sep	KLM
24 Aug - 08 Sep	KLM
27 Aug - 31 Aug	Scandinavian Airlines
18 Aug - 24 Aug	British Airways
25 Aug - 28 Aug	Scandinavian Airlines
04 Aug - 20 Aug	British Airways
11 Aug - 19 Aug	British Airways
12 Aug - 26 Aug	Aer Lingus
04 Aug - 25 Aug	British Airways
18 Aug - 31 Aug	British Airways
03 Aug - 10 Aug	British Airways
11 Aug - 25 Aug	Aer Lingus

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