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

Return flights

22 Jul - 28 Jul	Frontier Airlines
28 Jul - 03 Aug	Frontier Airlines
22 Jul - 26 Jul	Frontier Airlines
23 Jul - 30 Jul	Frontier Airlines
24 Jul - 27 Jul	Frontier Airlines
09 Jul - 20 Jul	Frontier Airlines
10 Jul - 16 Jul	Frontier Airlines
10 Jul - 20 Jul	Frontier Airlines
16 Jul - 21 Jul	Frontier Airlines
06 Jul - 14 Jul	Frontier Airlines
06 Jul - 13 Jul	Frontier Airlines
19 Jul - 02 Aug	United	direct

Also check the deals for one-way flights from San Francisco 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 Francisco to San Jose in July from 430€

Return flights