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

Return flights

21 Oct - 08 Nov	WestJet	direct
24 Oct - 28 Oct	WestJet	direct
28 Oct - 04 Nov	WestJet
26 Oct - 04 Nov	WestJet
27 Oct - 03 Nov	WestJet
27 Oct - 18 Nov	WestJet
29 Oct - 18 Nov	WestJet
30 Oct - 06 Nov	WestJet
26 Oct - 02 Nov	WestJet
29 Oct - 02 Nov	WestJet
21 Oct - 04 Nov	WestJet
13 Oct - 24 Oct	WestJet	direct
06 Oct - 16 Oct	WestJet	direct
16 Oct - 24 Oct	WestJet	direct
12 Oct - 21 Oct	WestJet	direct
03 Oct - 24 Oct	WestJet	direct
16 Oct - 30 Oct	WestJet	direct
20 Oct - 27 Oct	WestJet	direct
21 Oct - 28 Oct	WestJet	direct
21 Oct - 31 Oct	WestJet	direct

Also check the deals for one-way flights from Calgary to London 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 Calgary to London in October from 367€

Return flights