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

Return flights

02 Sep - 23 Sep	KLM
13 Sep - 27 Sep	KLM
14 Sep - 27 Sep	KLM
14 Sep - 28 Sep	KLM
07 Sep - 25 Sep	KLM
09 Sep - 27 Sep	KLM
06 Sep - 10 Sep	KLM
14 Sep - 23 Sep	KLM
07 Sep - 21 Sep	KLM
21 Sep - 28 Sep	KLM
19 Sep - 03 Oct	KLM
18 Sep - 02 Oct	Air France
18 Sep - 09 Oct	KLM
25 Sep - 16 Oct	KLM
25 Sep - 15 Oct	KLM
25 Sep - 15 Oct	WestJet	direct
25 Sep - 16 Oct	WestJet	direct
18 Sep - 02 Oct	WestJet	direct
18 Sep - 09 Oct	WestJet	direct
19 Sep - 03 Oct	WestJet	direct

Also check the deals for one-way flights from London to Calgary in September.

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 September from $748

Return flights