Cheapest return flights from San Francisco to San Diego in September from 48€

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

Return flights

15 Sep - 22 Sep Frontier Airlines direct
19 Sep - 22 Sep Frontier Airlines direct
13 Sep - 14 Oct Frontier Airlines direct
12 Sep - 19 Sep Frontier Airlines direct
04 Sep - 07 Sep Frontier Airlines direct
27 Sep - 28 Sep Frontier Airlines direct
21 Sep - 26 Sep Frontier Airlines direct
13 Sep - 13 Sep Alaska Airlines direct
22 Sep - 28 Sep Frontier Airlines direct

Also check the deals for one-way 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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