Cheapest one-way flights from San Francisco to San Diego in September from 24€

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

One-Way flights

18 Sep Frontier Airlines direct
25 Sep Frontier Airlines direct
04 Sep Frontier Airlines direct
17 Sep Hawaiian Airlines direct
20 Sep Frontier Airlines direct
27 Sep Frontier Airlines direct
08 Sep Southwest Airlines direct
22 Sep Southwest Airlines direct
30 Sep Southwest Airlines direct
01 Sep United direct

Also check the deals for return flights from San Francisco 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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