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

Return flights

28 Oct - 04 Nov	Delta
29 Oct - 04 Nov	Delta
29 Oct - 05 Nov	Delta
27 Oct - 02 Nov	KLM
27 Oct - 10 Nov	Delta
28 Oct - 03 Nov	Delta
31 Oct - 14 Nov	KLM
30 Oct - 12 Nov	Lufthansa
30 Oct - 13 Nov	Air Dolomiti
24 Oct - 03 Nov	Delta
24 Oct - 30 Oct	Lufthansa
24 Oct - 26 Oct	KLM
25 Oct - 28 Oct	KLM
26 Oct - 30 Oct	KLM
27 Oct - 30 Oct	ITA Airways
25 Oct - 31 Oct	KLM
27 Oct - 31 Oct	KLM
28 Oct - 31 Oct	KLM
26 Oct - 31 Oct	KLM
27 Oct - 28 Oct	KLM

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

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 October from 693€

Return flights