Cheapest return flights from Seattle to San Jose in January from $313

AirHint found the following cheapest return flights from Seattle (SEA) to San Jose (SJO) in January 2026 (see full year).

Return flights

26 Jan - 07 Feb Alaska Airlines
16 Jan - 24 Jan Alaska Airlines
17 Jan - 24 Jan Alaska Airlines
23 Jan - 05 Feb Frontier Airlines
13 Jan - 16 Jan American Airlines
17 Jan - 25 Jan Alaska Airlines
16 Jan - 25 Jan Alaska Airlines
02 Jan - 06 Feb United

Also check the deals for one-way flights from Seattle to San Jose in January.

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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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