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

One-Way flights

29 Dec	WestJet	direct
30 Dec	WestJet	direct
03 Dec	WestJet	direct
28 Dec	WestJet	direct
05 Dec	WestJet	direct
31 Dec	WestJet	direct
08 Dec	WestJet	direct
14 Dec	WestJet	direct
27 Dec	WestJet
11 Dec	Flair Airlines

Also check the deals for return flights from Calgary to London 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 one-way flights from Calgary to London in December from 133€

One-Way flights