AirHint found the following cheapest return flights from Seattle (SEA) to Vancouver (YVR) in December 2025 (see full year).

Return flights

24 Dec - 07 Jan	Delta	direct
23 Dec - 30 Dec	Delta	direct
10 Dec - 23 Dec	Delta	direct
04 Dec - 12 Dec	Air Canada	direct
07 Dec - 15 Jan	Alaska Airlines
11 Dec - 20 Dec	Air Canada	direct
11 Dec - 21 Dec	Alaska Airlines	direct
07 Dec - 15 Jan	Delta	direct
21 Dec - 28 Dec	Delta	direct
25 Dec - 03 Jan	Alaska Airlines	direct
26 Dec - 04 Jan	Alaska Airlines	direct
16 Dec - 02 Jan	WestJet
26 Dec - 03 Jan	Alaska Airlines	direct
16 Dec - 02 Jan	Delta	direct

Also check the deals for one-way flights from Seattle to Vancouver 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 Seattle to Vancouver in December from $188

Return flights