Cheapest return flights from San Diego to San Francisco in September from $66

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

Return flights

11 Sep - 13 Sep Frontier Airlines direct
04 Sep - 15 Sep Frontier Airlines direct
06 Sep - 07 Sep Frontier Airlines direct
12 Sep - 14 Sep Frontier Airlines direct
13 Sep - 14 Sep Frontier Airlines direct
19 Sep - 22 Sep Frontier Airlines direct
19 Sep - 21 Sep Frontier Airlines direct
26 Sep - 29 Sep Frontier Airlines direct
23 Sep - 24 Sep Alaska Airlines direct
30 Sep - 01 Oct Alaska Airlines direct
06 Sep - 10 Sep Alaska Airlines direct
30 Sep - 02 Oct Alaska Airlines direct
17 Sep - 05 Oct Hawaiian 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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