Cheapest return flights from San Diego to San Francisco in September from $57

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

Return flights

18 Sep - 20 Sep Frontier Airlines direct
13 Sep - 16 Sep Alaska Airlines direct
25 Sep - 28 Sep Alaska Airlines direct
11 Sep - 14 Sep Alaska Airlines direct
13 Sep - 15 Sep Frontier Airlines direct
11 Sep - 15 Sep Alaska Airlines direct
12 Sep - 14 Sep Alaska Airlines direct
12 Sep - 15 Sep Alaska Airlines direct
16 Sep - 17 Sep Alaska Airlines direct
27 Sep - 29 Sep Alaska Airlines direct
09 Sep - 21 Oct Alaska Airlines direct
09 Sep - 14 Oct Hawaiian Airlines direct
09 Sep - 28 Oct Hawaiian Airlines direct
18 Sep - 12 Oct United direct
27 Sep - 04 Oct Alaska Airlines direct
27 Sep - 05 Oct Alaska Airlines direct

Also check the deals for one-way flights from San Diego to San Francisco 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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