AirHint found the following cheapest return flights from Seattle (SEA) to San Jose Del Cabo (SJD) in December 2025 (see full year).

Return flights

01 Dec - 15 Dec	Aeromexico	direct
04 Dec - 07 Dec	American Airlines
16 Dec - 27 Dec	Alaska Airlines
26 Dec - 31 Dec	Alaska Airlines
30 Dec - 05 Jan	Alaska Airlines	direct
16 Dec - 27 Dec	Delta	direct
28 Dec - 02 Jan	Alaska Airlines
26 Dec - 03 Jan	Alaska Airlines
27 Dec - 02 Jan	Alaska Airlines
26 Dec - 31 Dec	Delta	direct
28 Dec - 02 Jan	Delta	direct
27 Dec - 02 Jan	Delta	direct
26 Dec - 03 Jan	Aeromexico	direct

Also check the deals for one-way flights from Seattle to San Jose Del Cabo 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 San Jose Del Cabo in December from $337

Return flights