AirHint found the following cheapest one-way flights from San Diego (SAN) to Calgary (YYC) in December 2025 (see full year).
One-Way flights
| 17 Dec | WestJet | direct | |
| 10 Dec | WestJet | direct | |
| 15 Dec | WestJet | direct | |
| 30 Dec | Alaska Airlines |
Also check the deals for return flights from San Diego to Calgary in December.
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