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

Return flights

28 Jul - 11 Aug	Spirit Airlines
30 Jul - 11 Aug	Spirit Airlines
30 Jul - 06 Aug	United
28 Jul - 31 Jul	Frontier Airlines
28 Jul - 10 Aug	Spirit Airlines
28 Jul - 06 Aug	Spirit Airlines
30 Jul - 10 Aug	Spirit Airlines
28 Jul - 07 Aug	Spirit Airlines
30 Jul - 07 Aug	Spirit Airlines
28 Jul - 02 Aug	Spirit Airlines
30 Jul - 02 Aug	Spirit Airlines
28 Jul - 30 Jul	Spirit Airlines

Also check the deals for one-way flights from San Diego to San Jose 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 Diego to San Jose in July from 420€

Return flights