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

Return flights

02 Dec - 11 Dec	Lufthansa
03 Dec - 10 Dec	SWISS
04 Dec - 08 Dec	Delta
05 Dec - 08 Dec	Delta
16 Dec - 08 Jan	Delta
24 Dec - 20 Jan	Virgin Atlantic
05 Dec - 15 Dec	Iberia
12 Dec - 15 Dec	Iberia
03 Dec - 17 Dec	Delta
10 Dec - 17 Dec	Delta
11 Dec - 16 Dec	British Airways
05 Dec - 09 Dec	SWISS
16 Dec - 12 Jan	Delta
24 Dec - 08 Jan	Virgin Atlantic
23 Dec - 08 Jan	Delta
24 Dec - 12 Jan	SWISS
22 Dec - 08 Jan	Delta
11 Dec - 10 Jan	Virgin Atlantic
23 Dec - 20 Jan	Virgin Atlantic
31 Dec - 09 Jan	Delta

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 $552

Return flights