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

Return flights

10 Dec - 14 Dec	Air Canada
04 Dec - 12 Dec	Air Canada
10 Dec - 15 Dec	Lufthansa
04 Dec - 13 Dec	Air Canada
02 Dec - 08 Dec	Austrian Airlines
02 Dec - 10 Dec	Lufthansa
05 Dec - 15 Dec	SWISS
04 Dec - 14 Dec	Lufthansa
06 Dec - 12 Dec	Lufthansa
05 Dec - 12 Dec	Lufthansa
11 Dec - 14 Jan	Lufthansa
11 Dec - 13 Jan	Lufthansa
12 Dec - 08 Jan	Vueling Airlines
12 Dec - 08 Jan	WestJet	direct
27 Dec - 16 Jan	Vueling Airlines
27 Dec - 15 Jan	Vueling Airlines
10 Dec - 07 Jan	British Airways
11 Dec - 10 Jan	British Airways
23 Dec - 17 Jan	British Airways
25 Dec - 17 Jan	WestJet	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 357€

Return flights