AirHint found the following cheapest return flights from San Diego (SAN) to San Jose (SJO) in August 2025 (see full year).

Return flights

25 Aug - 03 Sep	United
28 Aug - 09 Sep	Spirit Airlines
28 Aug - 06 Sep	Spirit Airlines
28 Aug - 17 Sep	Spirit Airlines
23 Aug - 09 Sep	Spirit Airlines
23 Aug - 06 Sep	Spirit Airlines
20 Aug - 27 Aug	Copa
29 Aug - 09 Sep	Spirit Airlines
29 Aug - 06 Sep	Spirit Airlines
20 Aug - 16 Sep	United
29 Aug - 17 Sep	Spirit Airlines
22 Aug - 30 Aug	United
20 Aug - 24 Aug	Copa

Also check the deals for one-way flights from San Diego to San Jose in August.

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 Diego to San Jose in August from 249€

Return flights