AirHint found the following cheapest return flights from London (YXU) to Calgary (YYC) in December 2025 (see full year).
Return flights
| 31 Dec - 07 Jan | WestJet | direct | |
| 30 Dec - 06 Jan | WestJet | direct | |
| 29 Dec - 01 Jan | WestJet | direct | |
| 28 Dec - 01 Jan | WestJet | direct | |
| 29 Dec - 02 Jan | WestJet | direct | |
| 28 Dec - 31 Dec | WestJet | direct |
Also check the deals for one-way flights from London to Calgary in December.
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