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

Return flights

04 Dec - 09 Dec	Air Dolomiti
01 Dec - 08 Dec	Lufthansa
02 Dec - 11 Dec	Lufthansa
16 Dec - 13 Jan	Lufthansa
07 Dec - 25 Dec	Lufthansa
09 Dec - 23 Dec	Lufthansa
01 Dec - 15 Dec	Lufthansa
30 Dec - 13 Jan	Air Dolomiti
30 Dec - 12 Jan	Air Dolomiti
07 Dec - 24 Dec	Lufthansa
13 Dec - 23 Dec	Virgin Atlantic
16 Dec - 23 Dec	Virgin Atlantic
15 Dec - 10 Jan	Virgin Atlantic
11 Dec - 07 Jan	Lufthansa
10 Dec - 25 Dec	Virgin Atlantic
09 Dec - 18 Jan	Virgin Atlantic
24 Dec - 13 Jan	Virgin Atlantic
06 Dec - 20 Jan	KLM
17 Dec - 12 Jan	Virgin Atlantic
24 Dec - 17 Jan	SWISS

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 403€

Return flights