AirHint found the following cheapest return flights from San Jose (SJC) to San Juan (SJU) in July 2025 (see full year).

Return flights

22 Jul - 30 Jul	Spirit Airlines
05 Jul - 19 Jul	Spirit Airlines
08 Jul - 15 Jul	Alaska Airlines
05 Jul - 12 Jul	American Airlines
09 Jul - 17 Jul	Alaska Airlines
03 Jul - 19 Jul	Spirit Airlines
14 Jul - 19 Jul	Alaska Airlines
03 Jul - 07 Jul	Southwest Airlines
25 Jul - 01 Aug	Delta
05 Jul - 07 Jul	Spirit Airlines
03 Jul - 12 Jul	Spirit Airlines
23 Jul - 01 Aug	Alaska Airlines
27 Jul - 01 Aug	Alaska Airlines
28 Jul - 03 Aug	Alaska Airlines

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

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 July from $328

Return flights