Cheapest return flights from San Jose to San Juan in January from $275

AirHint found the following cheapest return flights from San Jose (SJC) to San Juan (SJU) in January 2026 (see full year).

Return flights

24 Jan - 29 Jan Delta
12 Jan - 14 Jan Alaska Airlines
09 Jan - 16 Jan Frontier Airlines
17 Jan - 25 Jan American Airlines
12 Jan - 15 Jan Alaska Airlines
22 Jan - 28 Jan Alaska Airlines
11 Jan - 14 Jan Alaska Airlines
06 Jan - 13 Jan Alaska Airlines
13 Jan - 15 Jan Alaska Airlines
13 Jan - 16 Jan Alaska Airlines
28 Jan - 01 Feb Alaska Airlines

Also check the deals for one-way flights from San Jose to San Juan 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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