Cheapest one-way flights from San Jose to San Diego in September from $39

AirHint found the following cheapest one-way flights from San Jose (SJC) to San Diego (SAN) in September 2025 (see full year).

One-Way flights

27 Sep Alaska Airlines direct
29 Sep Alaska Airlines direct
25 Sep Alaska Airlines direct
23 Sep Spirit Airlines
22 Sep Spirit Airlines
17 Sep Spirit Airlines
11 Sep Frontier Airlines
15 Sep Frontier Airlines
13 Sep Alaska Airlines direct
17 Sep Alaska Airlines direct

Also check the deals for return flights from San Jose to San Diego in September.

Skyscanner

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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