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

Return flights

10 Dec - 12 Jan	Lufthansa
03 Dec - 13 Dec	Brussels Airlines
04 Dec - 10 Dec	SWISS
10 Dec - 13 Jan	Brussels Airlines
08 Dec - 14 Dec	Lufthansa
07 Dec - 14 Dec	Lufthansa
04 Dec - 07 Dec	Lufthansa
06 Dec - 12 Dec	Lufthansa
08 Dec - 15 Dec	Lufthansa
06 Dec - 13 Dec	Lufthansa
05 Dec - 08 Dec	Lufthansa
06 Dec - 14 Dec	Lufthansa
09 Dec - 18 Jan	SWISS
10 Dec - 11 Jan	SWISS
11 Dec - 12 Jan	Air Canada
11 Dec - 14 Jan	Air Canada
12 Dec - 13 Jan	Air Canada	direct
12 Dec - 17 Jan	Air Canada	direct
14 Dec - 13 Jan	Air Canada	direct
14 Dec - 12 Jan	Air Canada	direct

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

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 December from 336€

Return flights