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

Return flights

17 May - 23 May	Delta
20 May - 24 May	Southwest Airlines
15 May - 24 May	Southwest Airlines
01 May - 03 May	Southwest Airlines
04 May - 10 May	Alaska Airlines
22 May - 26 May	Southwest Airlines
07 May - 11 May	Alaska Airlines
14 May - 17 May	Alaska Airlines
24 May - 02 Jun	Alaska Airlines
14 May - 18 May	Alaska Airlines
22 May - 25 May	Alaska Airlines

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

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 San Jose to San Juan in May from $354

Return flights