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

Return flights

29 Oct - 08 Nov	WestJet
29 Oct - 04 Nov	WestJet
03 Oct - 11 Oct	WestJet
04 Oct - 11 Oct	WestJet
02 Oct - 06 Oct	WestJet
29 Oct - 01 Nov	WestJet
10 Oct - 19 Oct	Air Transat
09 Oct - 19 Oct	Air Transat
23 Oct - 06 Nov	Air Transat
12 Oct - 19 Oct	Air Transat
05 Oct - 19 Oct	Air Transat
23 Oct - 30 Oct	Air Transat
09 Oct - 14 Oct	Air Transat
10 Oct - 21 Oct	Air Transat
30 Oct - 10 Nov	Air Transat
24 Oct - 08 Nov	Air Transat
25 Oct - 01 Nov	Air Transat
14 Oct - 01 Nov	Air Transat
25 Oct - 08 Nov	Air Transat
21 Oct - 04 Nov	Air Transat

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 $516

Return flights