AirHint found the following cheapest return flights from London (YXU) to Calgary (YYC) in August 2025 (see full year).

Return flights

31 Aug - 04 Sep	WestJet
29 Aug - 04 Sep	Flair Airlines
30 Aug - 02 Sep	WestJet	direct
31 Aug - 03 Sep	WestJet
29 Aug - 02 Sep	Flair Airlines
28 Aug - 04 Sep	WestJet
27 Aug - 02 Sep	Flair Airlines
31 Aug - 05 Sep	WestJet
30 Aug - 04 Sep	WestJet
29 Aug - 02 Sep	WestJet	direct
27 Aug - 31 Aug	WestJet	direct
26 Aug - 31 Aug	WestJet	direct
30 Aug - 31 Aug	Air Canada
27 Aug - 30 Aug	Air Canada
27 Aug - 30 Aug	WestJet	direct
26 Aug - 29 Aug	WestJet	direct
27 Aug - 29 Aug	Flair Airlines
27 Aug - 29 Aug	WestJet	direct
25 Aug - 30 Aug	Flair Airlines
25 Aug - 28 Aug	Flair Airlines

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 $468

Return flights